Gypsum, popular sulfate mineral of great business worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-formulated crystals the mineral usually has actually been identified as selenite. The fibrous enormous selection includes a silky lustre and is named satin spar; it can be translucent and opalescent and is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050