Gypsum, common sulfate mineral of terrific professional great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In nicely-produced crystals the mineral typically has become known as selenite. The fibrous enormous range has a silky lustre and is termed satin spar; it's translucent and opalescent and it is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050