Gypsum, widespread sulfate mineral of fantastic business great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-produced crystals the mineral frequently continues to be referred to as selenite. The fibrous enormous selection features a silky lustre and is known as satin spar; it can be translucent and opalescent and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050