Gypsum, widespread sulfate mineral of good industrial relevance, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-created crystals the mineral frequently is identified as selenite. The fibrous significant wide range includes a silky lustre and known as satin spar; it really is translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050