Gypsum, typical sulfate mineral of great professional value, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-developed crystals the mineral frequently is called selenite. The fibrous enormous range includes a silky lustre and is known as satin spar; it can be translucent and opalescent and is particularly valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050