Gypsum, popular sulfate mineral of good professional great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-made crystals the mineral typically continues to be named selenite. The fibrous huge wide range includes a silky lustre and known as satin spar; it can be translucent and opalescent and it is valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050