"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Amethyst Expertly cut and polished into

Expertly cut and polished into a substantial square

5in x 11in

This vivid fluorescence is a characteristic property of high-quality Adamite

and Lazulite

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Amethyst Expertly cut and polished intoSelenite, a type of gypsum, is a hydrous calcium sulfate (CaSO42H2O) that forms monoclinic crystals with prismatic or bladed shapes and distinct rhombic appearance. It can also be found as arrowhead shaped twins with beveled edges. While pure selenite is colorless or white, impurities can result in shades of pale gray, yellow, red, and brown. With a hardness of 1. 5 2. 0, selenite is transparent to translucent and has a vitreous to pearly luster. It