Gypsum, widespread sulfate mineral of fantastic professional worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-produced crystals the mineral generally has been named selenite. The fibrous massive wide range has a silky lustre and is called satin spar; it is actually translucent and opalescent and is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050