Gypsum, widespread sulfate mineral of excellent industrial worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral typically has actually been termed selenite. The fibrous massive selection provides a silky lustre and is called satin spar; it is translucent and opalescent and is also valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050