Gypsum, widespread sulfate mineral of wonderful professional value, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-formulated crystals the mineral generally has been identified as selenite. The fibrous enormous assortment incorporates a silky lustre and known as satin spar; it's translucent and opalescent and is particularly valued for ornaments and jewelry. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050