Gypsum, popular sulfate mineral of fantastic industrial relevance, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-made crystals the mineral generally continues to be identified as selenite. The fibrous significant variety contains a silky lustre and is known as satin spar; it's translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050