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