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…
Category: Gem or Scam? Library
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…
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…
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…
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…
