Gypsum, popular sulfate mineral of great industrial significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-formulated crystals the mineral normally is known as selenite. The fibrous massive wide variety has a silky lustre and is named satin spar; it truly is translucent and opalescent and it is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050