Gypsum, widespread sulfate mineral of terrific professional value, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-formulated crystals the mineral usually has long been named selenite. The fibrous massive wide range features a silky lustre and is known as satin spar; it truly is translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050