Buddstone
Commercial name for green hornfels from South Africa, a metamorphic rock given its green color by inclusions of various green minerals such as chlorite, epidote…
Category: Gem or Scam? Library
Bertrandite
This official mineral name is sometimes incorrectly used for a fine-grained purple to pale violet variety of fluorite from Utah, United States. This stone has…
Bumblebee jasper/stone
Commercial name for a colorful volcanic rock found in West Java, Indonesia. Named for its resemblance to the black and yellow stripes of a bumblebee.…
Bismuth
Official mineral name for the element bismuth that occurs in pure form in nature, usually as dull gray masses and often accompanied by yellow or…
Cacoxenite (in quartz/amethyst)
Cacoxenite is an official mineral name for a secondary mineral found in oxidized zones of particularly phosphate-rich rocks. Almost always as small spherical aggregates of…
Blue alexandrite
Misleading synonym for blue or violet sapphire, a variety of corundum. The name “blue alexandrite” may be used to make the stone more attractive to…
Cactus quartz
Trade name for a variety/growth form of quartz in which the crystals are surrounded by a second generation of smaller crystals grown perpendicular to the…
Blue aventurine
Commercial name for blue quartz or quartzite-like material with shimmering inclusions of mica, ilmenite or hematite. Most blue aventurine offered comes from India and is…
(Crop) Circle Stones
Commercial name for polished flint said to have been found near (English) crop circles. Crop circles occur all over the world, but those in England…
Calligraphy stone
Commercial name for a yellowish-brown to brownish-red rock from the Indian Himalayas with light brown lines and arches. The curved lines are cross sections of…
