Gypsum, prevalent sulfate mineral of wonderful industrial relevance, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-designed crystals the mineral frequently has become identified as selenite. The fibrous massive range includes a silky lustre and known as satin spar; it can be translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050