Gypsum, typical sulfate mineral of wonderful business value, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-produced crystals the mineral normally has long been called selenite. The fibrous massive selection has a silky lustre and is named satin spar; it really is translucent and opalescent and is also valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050