Orange aventurine
Designation for a quartz variety with shimmering inclusions of a mica variety or hematite. No analysis is known. See aventurine. Do you have a nice…
Category: Gem or Scam? Library
Oregon Sunstone
Commercial name for a variety of labradorite, a plagioclase feldspar, with a Schiller effect (flash) with an orange/brown color from the state of Oregon, United…
Orgonite
Man-made geometric shapes of epoxy resin filled with minerals/crystals and metals. So Orgonite itself is not a mineral or gemstone, but is sometimes offered as…
Osolite Jasper
Commercial name for polychrome (multicolored) jasper. Do you have a nice example of this stone and would like to provide a photo for the library…
Opalite / opaline
A misleading trade name for man-made opalescent glass. This material looks somewhat like opal and is also frequently sold as (imitation of) real opal. In…
Ouro Verde (quartz)
Commercial name for a popular bright yellow/green variety of irradiated and heated smoky quartz. Thus the color is not natural, but treated by man. The…
Purple turquoise
Commercial name for a man-made product. These are usually natural pieces of turquoise from the Kingman Mine in Arizona that are crushed, dyed, stabilized and…
Pakulite™
Unregistered cmmercial name for a variety of rhyolite, a fine-grained spherulitic volcanic rock, usually with flow lines. Named for its site, Mount Paku in New…
Paraiba quartz
A commercial name for quartz with inclusions of the mineral gilalite. Named after the site of Paraiba, Brazil and thus not after the color of…
Peacock Ore
Commercial name for blue to multicolored chalcopyrite. Named for the colors of peacock feathers. Although these iridescent colors also occur in nature, most of the…
