Gypsum, common sulfate mineral of excellent business value, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-developed crystals the mineral commonly has long been identified as selenite. The fibrous substantial wide variety incorporates a silky lustre and is called satin spar; it can be translucent and opalescent and it is valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050