Gypsum, frequent sulfate mineral of good commercial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-created crystals the mineral typically has become known as selenite. The fibrous substantial wide range provides a silky lustre and is named satin spar; it is translucent and opalescent and is also valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050