Gypsum, common sulfate mineral of good industrial relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-made crystals the mineral usually has actually been referred to as selenite. The fibrous huge selection has a silky lustre and is named satin spar; it truly is translucent and opalescent and it is valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050