Gypsum, prevalent sulfate mineral of wonderful business importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-developed crystals the mineral frequently is named selenite. The fibrous enormous selection provides a silky lustre and known as satin spar; it's translucent and opalescent and it is valued for ornaments and jewelry. Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050