{"id":231884,"date":"2024-09-27T09:41:16","date_gmt":"2024-09-27T07:41:16","guid":{"rendered":"https:\/\/stapelvanstenen.nl\/lectures-and-workshops\/"},"modified":"2026-06-13T15:47:37","modified_gmt":"2026-06-13T13:47:37","slug":"lectures-and-workshops","status":"publish","type":"page","link":"https:\/\/stapelvanstenen.nl\/en\/lectures-and-workshops\/","title":{"rendered":"Lectures and workshops"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"231884\" class=\"elementor elementor-231884 elementor-822\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6b8acfc e-flex e-con-boxed e-con e-parent\" data-id=\"6b8acfc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5ad1217 e-con-full e-flex e-con e-child\" data-id=\"5ad1217\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6531cea elementor-widget elementor-widget-heading\" data-id=\"6531cea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Lectures and workshops on minerals, gemstones and geology<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9dd17ac elementor-widget elementor-widget-text-editor\" data-id=\"9dd17ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p>From knowledge center Stack of Stones (Stapel van Stenen), we offer <strong>lectures<\/strong>, <strong>workshops<\/strong> and <strong>guest lectured<\/strong> on minerals, gemstones, rocks, volcanoes and geological journeys. The offer is suitable for various target groups, from geological societies and schools to stores, day care centers, companies and private groups. <\/p><p>For geological societies, there are substantive lectures on mineralogy, geological processes, &#8216;scammite&#8217; and geological travels. For a broader interested audience, such as Rotary, Probus, libraries, women&#8217;s clubs and other civic organizations, the travel lectures, volcano lectures and general lectures on minerals and gemstones are especially appropriate. <\/p><p>Workshops are also available for schools, stores, wholesalers, healthcare facilities and private groups. These can focus on knowledge transfer, product knowledge, identification of minerals and gemstones or a general introduction to the world of geology and stones. <\/p><p>Check the <a href=\"https:\/\/stapelvanstenen.nl\/en\/agenda\/\">calendar<\/a> for scheduled activities or contact us to discuss options for your club, school, organization or group.<\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-668c3ad elementor-align-center elementor-widget elementor-widget-button\" data-id=\"668c3ad\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4f7b149 e-flex e-con-boxed e-con e-child\" data-id=\"4f7b149\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7dd3c75 elementor-widget elementor-widget-image\" data-id=\"7dd3c75\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2.jpg\" class=\"attachment-large size-large wp-image-243077\" alt=\"Stapel van Stenen belazeriet lezing MKA Antwerpen 2\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/belazeriet-lezing-MKA-Antwerpen-2-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f44d991 elementor-widget elementor-widget-image\" data-id=\"f44d991\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde.jpg\" class=\"attachment-large size-large wp-image-243079\" alt=\"Stapel van Stenen workshop schatten van de aarde\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7e6fdb70 e-flex e-con-boxed e-con e-parent\" data-id=\"7e6fdb70\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-74163a1d e-con-full e-flex e-con e-child\" data-id=\"74163a1d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e07a7c8 elementor-widget elementor-widget-image\" data-id=\"5e07a7c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink.jpg\" class=\"attachment-large size-large wp-image-236962\" alt=\"verzameling stapel van stenen rolf egberink\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/05\/verzameling-stapel-van-stenen-rolf-egberink-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2be0708 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"2be0708\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/this-is-me-rolf-egberink\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">More about Rolf Egberink<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3b03ca12 e-con-full e-flex e-con e-child\" data-id=\"3b03ca12\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2d86539e elementor-widget elementor-widget-text-editor\" data-id=\"2d86539e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>Choose the offer that suits your group<\/strong><\/h3><p>Most of the lectures and workshops will be given by <strong><a href=\"http:\/\/rolf\" data-wplink-url-error=\"true\">Rolf Egberink<\/a><\/strong>, founder of Stapel van Stenen. This draws on over forty years of experience as a collector of minerals and rocks, a background in education, his own research into minerals and gemstones, publications, courses and geological trips. <\/p><p>During lectures and workshops, own photographs, geological maps, books, practical examples and stones from the collection are used to clarify topics.<\/p><p>Lectures last on average two hours including breaks, but content and duration can be adapted to the target audience, knowledge level and time available. Activities are possible on location in the Netherlands and Belgium, online via Zoom or at Stapel van Stenen in Maastricht. <\/p><p>Lectures and workshops can be provided in English and Dutch. For specific topics, Stapel van Stenen can also mediate to an expert speaker or specialist from its own network if required. <\/p><p>Below is an overview of the various options.<\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-469600f e-flex e-con-boxed e-con e-parent\" data-id=\"469600f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-c675295 e-con-full e-flex e-con e-child\" data-id=\"c675295\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-54cf426 elementor-widget elementor-widget-image\" data-id=\"54cf426\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag.jpg\" class=\"attachment-large size-large wp-image-243097\" alt=\"lezing veldspaten Geologische vereniging den haag\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-veldspaten-Geologische-vereniging-den-haag-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-403dfb6 elementor-widget elementor-widget-image\" data-id=\"403dfb6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts.jpg\" class=\"attachment-large size-large wp-image-243099\" alt=\"lezing Geo Oss - groeivormen kwarts\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/lezing-Geo-Oss-groeivormen-kwarts-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2c2fa47 e-con-full e-flex e-con e-child\" data-id=\"2c2fa47\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7e02bb5 elementor-widget elementor-widget-text-editor\" data-id=\"7e02bb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>Mineralogical and geological topics<\/strong><\/h3><p>These lectures are particularly suitable for collectors, members of geological societies and other interested parties who want to learn more about minerals, rocks and geological processes. In doing so, we use a down-to-earth and factual approach: what do you see, how did it originate and how do you recognize what you have in your hands? <\/p><p>Available lectures:<\/p><ul><li>Gem or Scam?: recognizing fake, treated and man-made stones and misleading names<\/li><li>Feldspars: unknown makes unloved?<\/li><li>Growth forms of quartz<\/li><li>Dangerous minerals<\/li><li>Versatile fluorite<\/li><li>Barite and other heavyweights among sulfates<\/li><li>Tourmaline: multicolored gemstone<\/li><li>Glitters: minerals from the mica group and chlorite group<\/li><li>Geology of Twente, solid ground under our feet?<\/li><li>Volcanism and volcanic rocks<\/li><\/ul><p style=\"text-align: center;\"><em>Fee for geological societies and other non-profit organizations: <\/em><em>from \u20ac125 incl. VAT, excluding travel and any accommodation costs. For commercial organizations, we are happy to provide a customized quote.  <\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aabada3 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"aabada3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-326a207a e-flex e-con-boxed e-con e-parent\" data-id=\"326a207a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-a6fe7bf e-con-full e-flex e-con e-child\" data-id=\"a6fe7bf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5733bb93 elementor-widget elementor-widget-text-editor\" data-id=\"5733bb93\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>Geological travel lectures<\/strong><\/h3><p>These lectures focus on geological landscapes, volcanoes, rocks and minerals, combined with personal travel experiences and many of his own visual materials. The lectures are open to a wide audience, but are also suitable for geological societies. Depending on the target audience, the level of geological detail can be adapted.  <\/p><p>Available lectures:<\/p><ul><li>Iceland: land of fire and ice<\/li><li>Southern Norway: landscape-geology-stones-minerals<\/li><li>Java: life with active volcanoes<\/li><li>Active volcanoes of Italy<\/li><li>Volcanoes in the sea: geology and volcanism of Hawaii<\/li><li>A journey along active volcanoes of Costa Rica and Nicaragua<\/li><li>Highlights of volcano travel<\/li><\/ul><p style=\"text-align: center;\"><em>Fee for geological societies and other non-profit organizations: <\/em><em>from \u20ac125 incl. VAT, excluding travel and any accommodation costs. For commercial organizations, we are happy to provide a customized quote.  <\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f214391 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"f214391\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-28ad3a9c e-con-full e-flex e-con e-child\" data-id=\"28ad3a9c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b89cad9 elementor-widget elementor-widget-image\" data-id=\"2b89cad9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland.png\" class=\"attachment-large size-large wp-image-231034\" alt=\"Lezing Geologische reis naar IJsland\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland.png 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland-300x203.png 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland-768x518.png 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland-480x324.png 480w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland-600x405.png 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/08\/Geologische-reis-naar-IJsland-74x50.png 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3c1a4b9 elementor-widget elementor-widget-image\" data-id=\"3c1a4b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"369\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-1024x590.jpeg\" class=\"attachment-large size-large wp-image-243092\" alt=\"lezing en stenen vertellen het verhaal van de geologie van IJsland\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-1024x590.jpeg 1024w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-300x173.jpeg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-768x442.jpeg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-624x360.jpeg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-600x346.jpeg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant-87x50.jpeg 87w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/stenen-vertellen-het-verhaal-van-de-geologie-van-IJsland-lezing-GEA-Brabant.jpeg 1208w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6c28e86 e-flex e-con-boxed e-con e-parent\" data-id=\"6c28e86\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d73412d e-con-full e-flex e-con e-child\" data-id=\"d73412d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6e05721 elementor-widget elementor-widget-image\" data-id=\"6e05721\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen.jpg\" class=\"attachment-large size-large wp-image-243109\" alt=\"workshop stapel van stenen - winkel edelstenen\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-winkel-edelstenen-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1160ad0 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"1160ad0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4b3e794 e-con-full e-flex e-con e-child\" data-id=\"4b3e794\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34a5c7f elementor-widget elementor-widget-text-editor\" data-id=\"34a5c7f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>Workshops for stores and wholesalers<\/strong><\/h3><p>For stores, web shops and wholesalers, we give workshops on product knowledge of minerals and gemstones, identification and proper naming and recognizing treated or man-made stones. Honest and reliable information is important for buyers and sellers alike. <\/p><p>Possible topics:<\/p><ul><li>Basic knowledge of minerals and gemstones<\/li><li>What am I actually selling? Background on your own assortment <\/li><li>Recognizing &#8216;Scammite&#8217; (fake, treated and man-made stones and misleading names)<\/li><li>Safe handling of high-risk minerals<\/li><li>Honest product information for customers<\/li><\/ul><p style=\"text-align: center;\"><em>Each workshop is tailored to the target group, the desired level of knowledge and the time available. The cost therefore depends on such factors as duration, group size, location and preparation. Please feel free to contact us for a customized quote.  <\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9b6a9ef e-flex e-con-boxed e-con e-parent\" data-id=\"9b6a9ef\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-53e0c39 e-con-full e-flex e-con e-child\" data-id=\"53e0c39\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0b76149 elementor-widget elementor-widget-text-editor\" data-id=\"0b76149\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>Guest lectures for schools<\/strong><\/h3><p>For elementary and middle schools, we conduct guest lectures and workshops on geology. The lessons are hands-on, visual and interactive. Students view real rocks and learn how to look closely as a young explorer. The content is adapted to age and level.   <\/p><p>Examples:<\/p><ul><li>Volcanoes and volcanic rocks<\/li><li>Minerals and gemstones<\/li><li>Recognizing rocks<\/li><li>Treasures of the earth: introduction to fossils, rocks, minerals and gemstones<\/li><\/ul><p style=\"text-align: center;\"><em>Rate for schools: from \u20ac65 incl. VAT per hour, excluding travel expenses. For multiple groups or a customized program, we are happy to make an appropriate quote.  <\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ecba70 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"1ecba70\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0b40e6 elementor-widget elementor-widget-text-editor\" data-id=\"a0b40e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p> <\/p><p>Response Teacher group 6 elementary school (2026): <em>&#8220;It was a fantastic lesson! They were totally impressed and their heads (and mine too) were completely full. They were like sponges how they soaked up the information. I would definitely recommend your presentation to others!&#8221;<\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bcc1412 e-con-full e-flex e-con e-child\" data-id=\"bcc1412\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-62da716 elementor-widget elementor-widget-image\" data-id=\"62da716\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1.jpg\" class=\"attachment-large size-large wp-image-243112\" alt=\"gastles vulkanen basisschool 1\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-1-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f59b8ed elementor-widget elementor-widget-image\" data-id=\"f59b8ed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3.jpg\" class=\"attachment-large size-large wp-image-243114\" alt=\"gastles stenen basischool\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/gastles-vulkanen-opheusden-3-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-85448e6 e-flex e-con-boxed e-con e-parent\" data-id=\"85448e6\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ac4929b e-con-full e-flex e-con e-child\" data-id=\"ac4929b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ff69e1d elementor-widget elementor-widget-image\" data-id=\"ff69e1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2.jpg\" class=\"attachment-large size-large wp-image-243119\" alt=\"workshop edelstenen ouderen\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-2-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76fcd7a elementor-widget elementor-widget-image\" data-id=\"76fcd7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1.jpg\" class=\"attachment-large size-large wp-image-243126\" alt=\"workshop edelstenen ouderen 1\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-edelstenen-ouderen-1-1-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a4782d9 e-con-full e-flex e-con e-child\" data-id=\"a4782d9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ac0f28f elementor-widget elementor-widget-text-editor\" data-id=\"ac0f28f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p><strong>Workshops for the elderly and day care<\/strong><\/p><p>For day care, nursing homes and senior activities, we provide accessible workshops on gemstones, minerals and rocks. The emphasis is on looking, feeling, recognizing and sharing stories. <\/p><p>Example:<\/p><ul><li>A 1.5-hour gemstone workshop with examples of raw and cut gemstones, explanations of colors, shapes, origins and uses.<\/li><\/ul><p style=\"text-align: center;\"><em>Each workshop is tailored to the target group, the desired level of knowledge and the time available. The cost therefore depends on such factors as duration, group size, location and preparation. Please feel free to contact us for a customized quote.  <\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ba29f4 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"9ba29f4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0206244 elementor-widget elementor-widget-text-editor\" data-id=\"0206244\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p> <\/p><p>Review from an elderly day care center in Brabant: <em>&#8220;We enjoyed an interesting lecture by Rolf from Stapel Stenen. Clients and volunteers and staff listened attentively to the stories about the different stones. This was a very pleasant and instructive afternoon. To be repeated.&#8221;<\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-69ecfdc2 e-flex e-con-boxed e-con e-parent\" data-id=\"69ecfdc2\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-f167ff5 e-con-full e-flex e-con e-child\" data-id=\"f167ff5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1d9c0734 elementor-widget elementor-widget-text-editor\" data-id=\"1d9c0734\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p><strong>Workshop in Maastricht: Treasures of the Earth<\/strong><\/p><p>Want to do something different than a standard outing with a small group? In Maastricht, we host groups of up to 8 people for an easy accessible workshop on rocks, minerals, gemstones and fossils. <\/p><p>You will be introduced to the world of stones, view examples from the collection and learn how to look at stones around you with different eyes.<\/p><p>Practical:<\/p><ul><li>Duration: 2 hours, including break<\/li><li>Location: Stapel van Stenen, Maastricht, Netherlands<\/li><li>Group: minimum 4 and maximum 8 people<\/li><li>Includes coffee\/tea and cake<\/li><li><p>Rate: \u20ac34.50 per person incl. VAT <\/p><\/li><\/ul>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3024358 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"3024358\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0ea6e0 elementor-widget elementor-widget-text-editor\" data-id=\"d0ea6e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p> <\/p><p>Review from a participant (2025): <em>&#8220;After your workshop the children look at the world with different eyes. They see fossils everywhere in the rocks and walls during our vacation in Malta.&#8221;<\/em><\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-27a66f3a e-con-full e-flex e-con e-child\" data-id=\"27a66f3a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6d4826f elementor-widget elementor-widget-image\" data-id=\"6d4826f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht.jpg\" class=\"attachment-large size-large wp-image-243132\" alt=\"workshop schatten van de aarde maastricht\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-schatten-van-de-aarde-maastricht-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a73b7b elementor-widget elementor-widget-image\" data-id=\"9a73b7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken.jpg\" class=\"attachment-large size-large wp-image-243134\" alt=\"workshop - in de collectie kijken\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-in-de-collectie-kijken-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cdaa658 e-flex e-con-boxed e-con e-parent\" data-id=\"cdaa658\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-e3f982c e-con-full e-flex e-con e-child\" data-id=\"e3f982c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-14cc420 elementor-widget elementor-widget-image\" data-id=\"14cc420\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen.jpg\" class=\"attachment-large size-large wp-image-243178\" alt=\"workshop stapel van stenen 1-op-1 herkennen van mineralen\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2026\/05\/workshop-stapel-van-stenen-1-op-1-herkennen-van-mineralen-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-03e1ebe e-con-full e-flex e-con e-child\" data-id=\"03e1ebe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-76c0cd4 elementor-widget elementor-widget-text-editor\" data-id=\"76c0cd4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>1-on-1 mineral or gemstone identification workshop<\/strong><\/h3><p>Would you like to learn specifically how to identify minerals or gemstones? Then a private workshop is possible in Maastricht. You can bring your own stones.  <\/p><p>Possible topics:<\/p><ul><li>Basic identification skills: crystal shape, hardness, cleavage, etc.<\/li><li>Working with hand lens or magnifying glass, microscope and gemological instruments<\/li><li>Recognizing &#8216;Scammite&#8217;: fake, treated or man-made stones and misleading names<\/li><li>Organizing and recording one&#8217;s own collection<\/li><\/ul><p>Each 1-on-1 workshop is tailored to your questions, knowledge level and learning goals. The cost depends on the duration and desired content. Please feel free to contact us for a customized quote.  <\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c53efb elementor-align-center elementor-widget elementor-widget-button\" data-id=\"8c53efb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f1079f8 e-flex e-con-boxed e-con e-parent\" data-id=\"f1079f8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-4f98af2 e-con-full e-flex e-con e-child\" data-id=\"4f98af2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34e0fa8 elementor-widget elementor-widget-text-editor\" data-id=\"34e0fa8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<h3><strong>Interested?<\/strong><\/h3><p>Want to book a lecture, guest lesson or workshop? <\/p><p>Please contact us and briefly tell us what group it is for, where it is taking place, how many participants you expect and what topic appeals to you. Then we will be happy to help think of a suitable format. <\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-844568f elementor-align-center elementor-widget elementor-widget-button\" data-id=\"844568f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/stapelvanstenen.nl\/en\/contact-lecture-or-workshop\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-531065c elementor-widget elementor-widget-text-editor\" data-id=\"531065c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p> <\/p><p style=\"text-align: center;\">Check the <a style=\"background-color: #527057;\" href=\"https:\/\/stapelvanstenen.nl\/en\/agenda\/\">calendar<\/a> for scheduled activities here.<\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-019e2eb e-con-full e-flex e-con e-child\" data-id=\"019e2eb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e35a01e elementor-widget elementor-widget-image\" data-id=\"e35a01e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"432\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen.jpg\" class=\"attachment-large size-large wp-image-237410\" alt=\"portret Rolf Egberink Stapel van Stenen\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen-624x421.jpg 624w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen-600x405.jpg 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2025\/06\/portret-Rolf-Egberink-Stapel-van-Stenen-74x50.jpg 74w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-052f1ef e-flex e-con-boxed e-con e-parent\" data-id=\"052f1ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91138de elementor-widget elementor-widget-heading\" data-id=\"91138de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Some inspirational examples<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0304792 elementor-widget elementor-widget-text-editor\" data-id=\"0304792\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"bb-theme-elementor-wrap bb-elementor-custom-color bb-elementor-custom-family bb-elementor-custom-size bb-elementor-custom-line-height\">\t\t\t\t<p>Below are some examples of lectures and workshops from my current offerings. These give an impression of the topics and approach, but many activities are tailored to the target group, knowledge level and time available. Customization is always possible.  <\/p>\t\t\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-34ac64b e-grid e-con-boxed e-con e-parent\" data-id=\"34ac64b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f43c409 elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"f43c409\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/L-lopeziet-scaled-1.png\" class=\"attachment-full size-full wp-image-230953\" alt=\"\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/L-lopeziet-scaled-1.png 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/L-lopeziet-scaled-1-300x200.png 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/L-lopeziet-scaled-1-768x512.png 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/L-lopeziet-scaled-1-480x320.png 480w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/L-lopeziet-scaled-1-600x400.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Dangerous minerals<\/h3><p class=\"elementor-image-box-description\">There are risks in handling some dangerous minerals. In fact, some minerals are quite toxic or give off radioactive radiation. When collecting or using minerals, it is important to know how to be aware of them. For example, which minerals are better not to give to your children or use to make gemstone water? We also give tips on how to safely handle dangerous minerals.    \n\nFeatured are radioactive minerals such as Torbernite, Autunite and Monazite; minerals from the asbestos group such as Chrysotile, Riebeckite, Crocidolite, Serpentine and Actinolite; minerals containing heavy metals for example copper, lead and antimony, Malachite, Galenite and Stibnite; other high-risk minerals such as the lab-grown Lopezite and Chalcanthite and the arsenic-containing minerals Orpiment, Realgar and Bumblebee Jasper.\n\n<b>A lecture for members of a geological society.<\/b><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e588dcb elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"e588dcb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"576\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-vulkaan.jpg\" class=\"attachment-full size-full wp-image-230931\" alt=\"\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-vulkaan.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-vulkaan-300x225.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-vulkaan-510x382.jpg 510w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-vulkaan-480x360.jpg 480w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-vulkaan-600x450.jpg 600w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Earth and volcanism: an introduction to the planet we live on<\/h3><p class=\"elementor-image-box-description\">Most people actually know very little about the planet we live on. This lecture will introduce you to the basics of the Earth's formation, its structure and some of the geological processes. In particular, plate tectonics (the shifting of continents) and volcanism will be discussed in more detail.  \n\n<b>A lecture with lots of images and stones and excellent for refreshing the general knowledge of a wide audience.<\/b><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95530e4 elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"95530e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"540\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-Gletsjer.jpg\" class=\"attachment-full size-full wp-image-230934\" alt=\"\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-Gletsjer.jpg 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-Gletsjer-300x203.jpg 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-Gletsjer-768x518.jpg 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-Gletsjer-480x324.jpg 480w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/03\/Ijsland-Gletsjer-600x405.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Iceland: land of fire and ice<\/h3><p class=\"elementor-image-box-description\">In the summer of 2021, we drove 4,300 km in 4 weeks with a small camper van and walked over 300,000 steps to see all corners of Iceland. What an impressive island! \n\nOf course the lecture will include the well-known highlights of the Golden Circle in the south, but we will also pass by the Snaefellsnes Peninsula, the remote Westfjords, Akureyri and Myvatn in the north, Seydisfjordur and the Eastfjords in the east and the glaciers, waterfalls and glacial lakes in the south. Cherry on the cake, of course, is the active eruption of the Fagradalsfjall volcano! \n\nA travelogue filled with rugged nature, ice, waterfalls, volcanoes and hot springs and, of course, the rocks and minerals found there.\n\n<b>A lecture with a travelogue for a geological society.<\/b><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36661ce elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"36661ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1.png\" class=\"attachment-full size-full wp-image-230900\" alt=\"Belazerite or not\" srcset=\"https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1.png 800w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1-300x300.png 300w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1-150x150.png 150w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1-768x768.png 768w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1-480x480.png 480w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1-600x600.png 600w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/Belazeriet-of-niet-front-1-100x100.png 100w, https:\/\/stapelvanstenen.nl\/wp-content\/uploads\/2023\/02\/elementor\/thumbs\/Belazeriet-of-niet-front-1-q3svfrx5hurid6trsp613nc33amepiepbwgqz6hudw.png 450w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Recognizing fake and counterfeit<\/h3><p class=\"elementor-image-box-description\">Many gems, minerals and rocks are sold under a variety of commercial and fancy names. There is also a lot of treated or entirely man-made material on the market for which misleading names are used. Meanwhile, it has become quite a chaos in terms of naming in the world of gemstones and minerals. Moreover, it is often unclear exactly what kind of stone it is. And is it 'Scammite' or not?    \nThis workshop will discuss many synonyms, trademarks and fancy names for gemstones and minerals. This will include information on scientific naming and whether the material is natural or non-natural. Tips for recognizing Scammite will also be discussed.  \n\n<b>An (online) interactive workshop whose content is related to the Gem or Scam Library.<\/b><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Lectures and workshops on minerals, gemstones and geology From knowledge center Stack of Stones (Stapel van Stenen), we offer lectures, workshops and guest lectured on&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-231884","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/pages\/231884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/comments?post=231884"}],"version-history":[{"count":2,"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/pages\/231884\/revisions"}],"predecessor-version":[{"id":243183,"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/pages\/231884\/revisions\/243183"}],"wp:attachment":[{"href":"https:\/\/stapelvanstenen.nl\/en\/wp-json\/wp\/v2\/media?parent=231884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}