Gypsum, widespread sulfate mineral of wonderful business great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-designed crystals the mineral generally continues to be termed selenite. The fibrous significant wide range provides a silky lustre and is named satin spar; it can be translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050