Gypsum, widespread sulfate mineral of excellent business great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-formulated crystals the mineral commonly has actually been called selenite. The fibrous massive selection has a silky lustre and is termed satin spar; it is actually translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050