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Weight: 266g
Weight: 630g
This mineral is typically found in igneous and some metamorphic rocks
This listing is for one fossilized Flexicalymene trilobite fossil within a geode
Polished Shattukite slab from Namibia
"Fishtail" Selenite / Gypsum Specimen - Sierra Mojada, Mexico opal Weight: 266gSelenite, 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
