Gypsum, typical sulfate mineral of wonderful industrial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-made crystals the mineral normally is called selenite. The fibrous large variety incorporates a silky lustre and is called satin spar; it is translucent and opalescent which is valued for ornaments and jewelry. Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050