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…
Category: Gem or Scam? Library
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…
Sphalerite
Official mineral name for a zinc sulfide (ZnS), with a characteristic resinous to submetallic luster and usually brown to black color. In pure form, sphalerite…
Phoenix stone
Commercial name for a white stone with blue-green flecks and black grains. The name suggests something rare and powerful, possibly inspired by the mythical phoenix…
Dragonglass obsidian
Commercial name for weathered nodules of obsidian, from the island of Milos, Greece. Dragonglass obsidian is a recently described type of obsidian discovered by Ismini…
Geraisite
A local name for a only recently identified type of natural impact glass (tektite) from the state of Minas Gerais in Brazil. The name refers…
Alum
Alum (or Dutch aluin) is a general name for compounds consisting of aluminum (or sometimes another metal with a charge of 3+) and an alkali…
Potassium ferricyanide (red)
Potassium hexacyanoferrate(III), also known as potassium ferricyanide or Cyanorubin (German), is a synthetic compound with the chemical formula K₃[Fe(CN)₆]. In pure form, it forms ruby…
