Gypsum, typical sulfate mineral of great business relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-designed crystals the mineral generally has long been called selenite. The fibrous massive range includes a silky lustre and is named satin spar; it's translucent and opalescent which is valued for ornaments and jewelry. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050