Gypsum, frequent sulfate mineral of great professional importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral generally continues to be referred to as selenite. The fibrous large assortment has a silky lustre and is called satin spar; it can be translucent and opalescent and is particularly https://www.propanraya.com/id/produk/eco-gypsum-ee-4050