Gypsum, widespread sulfate mineral of terrific professional great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In effectively-developed crystals the mineral commonly has become known as selenite. The fibrous massive variety includes a silky lustre and is called satin spar; it is translucent and opalescent and is also valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050