Gypsum, common sulfate mineral of great commercial great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-created crystals the mineral commonly has been named selenite. The fibrous enormous assortment contains a silky lustre and is named satin spar; it is translucent and opalescent and is valued for ornaments and jewelry. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050