Gypsum, frequent sulfate mineral of excellent business significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-designed crystals the mineral normally is identified as selenite. The fibrous enormous variety features a silky lustre and is known as satin spar; it is actually translucent and opalescent and is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050