Gypsum, typical sulfate mineral of good commercial relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral generally has actually been referred to as selenite. The fibrous huge variety includes a silky lustre and is termed satin spar; it's translucent and opalescent and it is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050