Gypsum, common sulfate mineral of great industrial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-created crystals the mineral generally has actually been referred to as selenite. The fibrous large wide variety includes a silky lustre and is called satin spar; it is translucent and opalescent and it is valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050