Gypsum, popular sulfate mineral of fantastic professional significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-designed crystals the mineral usually has long been referred to as selenite. The fibrous substantial assortment features a silky lustre and is called satin spar; it can be translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050