"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico thumbnail complete with charming wings

complete with charming wings

Hyalite Opal Specimen

This 769g gemstone brings an opulent character to any décor

First generation: Scalenohedral crystals that are coated with a thin layer of brown iron oxide

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico thumbnail complete with charming wingsSelenite, 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