Gypsum, widespread sulfate mineral of fantastic industrial significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-produced crystals the mineral normally continues to be known as selenite. The fibrous substantial assortment contains a silky lustre and is called satin spar; it's translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050