Gypsum, prevalent sulfate mineral of wonderful industrial importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-produced crystals the mineral commonly is referred to as selenite. The fibrous massive assortment features a silky lustre and is named satin spar; it truly is translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050