Gypsum, popular sulfate mineral of fantastic commercial importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-designed crystals the mineral normally is known as selenite. The fibrous massive selection has a silky lustre and is referred to as satin spar; it's translucent and opalescent and is valued for ornaments and jewelry. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050