Gypsum, prevalent sulfate mineral of great business significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-designed crystals the mineral frequently has been called selenite. The fibrous significant range incorporates a silky lustre and is termed satin spar; it really is translucent and opalescent and is particularly valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050