Gypsum, typical sulfate mineral of excellent industrial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-formulated crystals the mineral typically is identified as selenite. The fibrous significant wide variety includes a silky lustre and is termed satin spar; it can be translucent and opalescent and is also valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050