Gypsum, popular sulfate mineral of terrific business great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-made crystals the mineral typically has long been known as selenite. The fibrous substantial range incorporates a silky lustre and is named satin spar; it can be translucent and opalescent and is also valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050