Gypsum, popular sulfate mineral of fantastic industrial significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-designed crystals the mineral typically has been called selenite. The fibrous substantial variety contains a silky lustre and is named satin spar; it is actually translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050