Gypsum, common sulfate mineral of great commercial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-formulated crystals the mineral typically has long been termed selenite. The fibrous huge wide range incorporates a silky lustre and is referred to as satin spar; it is translucent and opalescent and is also https://www.propanraya.com/id/produk/eco-gypsum-ee-4050