Gypsum, common sulfate mineral of good industrial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-formulated crystals the mineral generally has become known as selenite. The fibrous massive selection provides a silky lustre and is known as satin spar; it can be translucent and opalescent which is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050