"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Pyramid These also have varying UV

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

and creamy tan hues

rusty browns

Because the material is meticulously formulated to remain entirely free from the unpredictable fracture lines

making it a unique and valuable addition to any collection

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico Pyramid These also have varying UVSelenite, 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