Gypsum, frequent sulfate mineral of terrific business relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-developed crystals the mineral usually continues to be named selenite. The fibrous huge selection provides a silky lustre and known as satin spar; it can be translucent and opalescent and is also valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050