Gypsum, common sulfate mineral of good professional relevance, made up of hydrated calcium sulfate (CaSO4·2H2O). In effectively-produced crystals the mineral generally is known as selenite. The fibrous enormous wide range provides a silky lustre and is known as satin spar; it can be translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050