Gypsum, prevalent sulfate mineral of terrific business importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In very well-made crystals the mineral commonly continues to be named selenite. The fibrous large selection includes a silky lustre and is known as satin spar; it is translucent and opalescent and is also valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050