Gypsum, widespread sulfate mineral of great industrial great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-made crystals the mineral typically continues to be referred to as selenite. The fibrous substantial wide range includes a silky lustre and is referred to as satin spar; it really is translucent and opalescent https://www.propanraya.com/id/produk/eco-gypsum-ee-4050