Mascagnite
Official name for the rare ammonium sulfate mineral with the chemical formula (NHâ‚„)â‚‚SOâ‚„. It forms a series with arcanite (potassium sulfate, Kâ‚‚SOâ‚„), where arcanite and…
Category: Gem or Scam? Library
Larimar
Commercial name for a solid blue variety of the mineral pectolite, found exclusively in the Dominican Republic and widely used as an ornamental stone. Also…
K2 (-azurite/granite/jasper/stone)
Commercial name for granite with round patches of blue azurite. Found on K2: the second highest mountain in the world (8,611 m) located in the…
Baked Amethyst / Heat-Treated Amethyst (HTA)
Designation for heated amethyst that turns yellow-brown as a result and often has to pass for citrine. Because real (untreated) citrine is a rare and…
Green moonstone (with garnierite)
Commercial name for a gray-green stone with (bright) green veins and sometimes with a form of bluish “flash” or pearlescent sheen. In 2021, I had…
Sakura agate / jasper / stone
Commercial name for a metamorphic rock with a unique flower-like texture. Cut objects of this stone are sold commercially under many different names, including: Cherry…
Lilaczanite
Commercial name for quartz with a light purple color and a milky or opal-like hue similar to girasol quartz. This material is sometimes offered as…
Verdite
Commercial name for a green stone, primarily an impure fuchsite, originally from North Cape River, South Africa. Consists mainly of fuchsite, with small amounts of…
Pet Rockâ„¢
Commercial name for a collectible invented in 1975 by advertising executive Gary Dahl. The original Pet Rocksâ„¢ were smooth stones from Rosarito Beach, Mexico. They…
Que Sera Stoneâ„¢
Registered commercial trader name for a volcanic rock (rhyolite) that includes blue quartz and pink feldspar. Esoteric crystal author Melody first described the rock in…
