Gypsum, widespread sulfate mineral of good industrial value, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-created crystals the mineral frequently has long been referred to as selenite. The fibrous enormous range contains a silky lustre and is termed satin spar; it is actually translucent and opalescent and is also https://www.propanraya.com/id/produk/eco-gypsum-ee-4050