"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico thumbnail An exquisitely hand carved carving

An exquisitely hand carved carving of a dragon on a wall

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

Sized between 3in and 4 in long and 2in -in wide

sometimes referred to in the trade as Aquatine or Blue Onyx

Unlike larger

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico thumbnail An exquisitely hand carved carvingSelenite, 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