Gypsum, prevalent sulfate mineral of great commercial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In effectively-formulated crystals the mineral frequently has become known as selenite. The fibrous significant selection includes a silky lustre and is named satin spar; it can be translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050