Gypsum, common sulfate mineral of wonderful commercial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-produced crystals the mineral typically continues to be identified as selenite. The fibrous large wide variety provides a silky lustre and is referred to as satin spar; it can be translucent and opalescent and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050