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