Gypsum, typical sulfate mineral of excellent commercial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-produced crystals the mineral normally is referred to as selenite. The fibrous huge variety contains a silky lustre and is referred to as satin spar; it's translucent and opalescent which is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050