Gypsum, popular sulfate mineral of excellent commercial great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-produced crystals the mineral frequently is referred to as selenite. The fibrous large assortment provides a silky lustre and is named satin spar; it really is translucent and opalescent which is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050