"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico septaria These internal structures are often

These internal structures are often highlighted by the water-clear transparency of the host selenite

the patterns are incredibly dynamic

Switch on a longwave (365nm) UV light

Each Cabochon is between 1

Weight: 2184g

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico septaria These internal structures are oftenSelenite, 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