Gypsum, popular sulfate mineral of wonderful industrial importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-developed crystals the mineral frequently has actually been named selenite. The fibrous significant wide variety contains a silky lustre and is termed satin spar; it is actually translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050