Gypsum, prevalent sulfate mineral of wonderful professional worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-formulated crystals the mineral commonly has become referred to as selenite. The fibrous massive variety contains a silky lustre and is referred to as satin spar; it is translucent and opalescent and is particularly https://www.propanraya.com/id/produk/eco-gypsum-ee-4050