Gypsum, common sulfate mineral of excellent industrial value, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-produced crystals the mineral normally is called selenite. The fibrous massive variety includes a silky lustre and is called satin spar; it truly is translucent and opalescent and is valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050