Gypsum, common sulfate mineral of wonderful industrial importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-made crystals the mineral commonly is called selenite. The fibrous huge assortment features a silky lustre and is called satin spar; it can be translucent and opalescent and is particularly valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050