Seftonite
Name for a translucent, moss-green variety of chalcedony, but used as a commercial name for a green-gray chalcedony from Africa with angular pieces of red…
Category: Gem or Scam? Library
Peanut obsidian
Commercial name for orbicular perlite from Mexico, actually a “devitrified” obsidian, also known as red snowflake obsidian and also sold under the name Peanut Obsidian.…
Praetorianite
Commercial name for a massive variety of grossular, a green mineral from the garnet group. Named for Pretoria, the administrative capital of South Africa, where…
Nundorite
Local (lapidary-commercial) name for a unique rock with a distinctive appearance: a fine matrix in beige to brown with scattered, often oval crystals of pale…
Kobyashevite
Official mineral name for a rare copper sulfate with the formula Cuâ‚…(SOâ‚„)â‚‚(OH)₆ – 4Hâ‚‚O. It usually forms blue-green to turquoise-colored crystals with a glassy luster.…
Cotton Candy agate
Commercial name for a natural combination of pink jasper and white agate from Mexico. This variegated pink and white stone is marketed under names such…
Firefly quartz
Commercial name for quartz crystals containing petroleum inclusions, mainly from Madagascar. Under UV light, these petroleum inclusions exhibit a bright yellow-green to yellow-white fluorescence, reminiscent…
Black Rose fluorite
Commercial name for nearly black fluorite that has been popping up on major international sales platforms since 2023, but has since found its way to…
Imperial topaz
Commercial name for a natural brownish-yellow to orange-red variety of topaz, usually from Brazil. Topaz is a common, natural mineral with the chemical formula Alâ‚‚SiOâ‚„(F,OH)â‚‚.…
Morenosite
Official mineral name for nickel(II) sulfate heptahydrate, chemically represented as NiSOâ‚„-7Hâ‚‚O. It belongs to the epsomite group, which also includes such compounds as epsomite (magnesium…
