"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Tray this specimen offers a unique

this specimen offers a unique blend of beauty and scientific

Small: 40-60g

not a single mineral

silky reflection

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Tray this specimen offers a uniqueSelenite, 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