Gypsum, widespread sulfate mineral of wonderful commercial great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-created crystals the mineral typically is known as selenite. The fibrous significant variety has a silky lustre and is named satin spar; it truly is translucent and opalescent and is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050