Gypsum, frequent sulfate mineral of terrific business significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-produced crystals the mineral commonly has actually been identified as selenite. The fibrous substantial range includes a silky lustre and is referred to as satin spar; it's translucent and opalescent and is also valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050