Gypsum, common sulfate mineral of good business worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-developed crystals the mineral commonly continues to be referred to as selenite. The fibrous massive selection has a silky lustre and known as satin spar; it is translucent and opalescent and is particularly valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050