Gypsum, common sulfate mineral of fantastic professional value, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-formulated crystals the mineral commonly continues to be referred to as selenite. The fibrous massive variety incorporates a silky lustre and is referred to as satin spar; it's translucent and opalescent and it is valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050