Gypsum, frequent sulfate mineral of excellent commercial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral normally is named selenite. The fibrous massive wide variety features a silky lustre and is known as satin spar; it truly is translucent and opalescent and is particularly valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050