Gypsum, typical sulfate mineral of good professional worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-made crystals the mineral generally has actually been known as selenite. The fibrous substantial range 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