Gypsum, common sulfate mineral of great professional significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-produced crystals the mineral frequently has long been called selenite. The fibrous significant selection provides a silky lustre and is called satin spar; it is actually translucent and opalescent and is valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050