Gypsum, common sulfate mineral of wonderful business value, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-produced crystals the mineral commonly has actually been referred to as selenite. The fibrous significant wide variety contains a silky lustre and is termed satin spar; it is translucent and opalescent and is particularly https://www.propanraya.com/id/produk/eco-gypsum-ee-4050