Gypsum, prevalent sulfate mineral of wonderful industrial great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-made crystals the mineral generally has long been termed selenite. The fibrous significant selection provides a silky lustre and is termed satin spar; it is translucent and opalescent and is also valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050