Gypsum, common sulfate mineral of terrific commercial value, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-designed crystals the mineral frequently has long been identified as selenite. The fibrous enormous selection includes a silky lustre and is called satin spar; it's translucent and opalescent which is valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050