Gypsum, common sulfate mineral of excellent business importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-created crystals the mineral typically is referred to as selenite. The fibrous huge variety incorporates a silky lustre and is termed satin spar; it's translucent and opalescent and it is valued for ornaments and jewellery. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050