"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Pyramid it’s a tiny snapshot of

it’s a tiny snapshot of a very specific high-heat environment from millions of years ago

These also have varying UV reaction with long-wave/mediun-wave/short-wave

and creamy tan hues

making it a unique and valuable addition to any collection

rusty browns

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Pyramid it’s a tiny snapshot ofSelenite, 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