Gypsum, frequent sulfate mineral of great commercial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In effectively-designed crystals the mineral frequently has been called selenite. The fibrous huge assortment provides a silky lustre and is termed satin spar; it can be translucent and opalescent and it is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050