Gypsum, prevalent sulfate mineral of excellent industrial value, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral generally has actually been called selenite. The fibrous substantial range provides a silky lustre and is called satin spar; it is translucent and opalescent and is particularly valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050