Gypsum, common sulfate mineral of wonderful industrial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In nicely-produced crystals the mineral frequently has been known as selenite. The fibrous significant wide range incorporates a silky lustre and is called satin spar; it is actually translucent and opalescent and is also valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050