Gypsum, widespread sulfate mineral of good commercial significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In nicely-made crystals the mineral frequently has been termed selenite. The fibrous large range incorporates a silky lustre and is known as satin spar; it's translucent and opalescent which is valued for ornaments and jewelry. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050