Gypsum, frequent sulfate mineral of fantastic commercial importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-made crystals the mineral frequently has long been referred to as selenite. The fibrous significant range incorporates a silky lustre and is called satin spar; it is actually translucent and opalescent and it is valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050