Gypsum, popular sulfate mineral of wonderful industrial importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-developed crystals the mineral frequently continues to be referred to as selenite. The fibrous enormous variety features a silky lustre and is known as satin spar; it is actually translucent and opalescent and is also https://www.propanraya.com/id/produk/eco-gypsum-ee-4050