Gypsum, prevalent sulfate mineral of good business relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-formulated crystals the mineral typically is termed selenite. The fibrous significant range incorporates a silky lustre and is named satin spar; it is actually translucent and opalescent which is valued for ornaments and jewelry. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050