"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico thumbnail this Red Tiger's Eye piece

this Red Tiger's Eye piece is an interesting option to consider

sometimes referred to in the trade as Aquatine or Blue Onyx

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

complete with charming wings

Unlike larger

"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico thumbnail this Red Tiger's Eye pieceSelenite, 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