Gypsum, typical sulfate mineral of great industrial great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-designed crystals the mineral normally is referred to as selenite. The fibrous massive wide variety provides a silky lustre and is named satin spar; it is translucent and opalescent and is also valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050