Gypsum, widespread sulfate mineral of excellent industrial significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-made crystals the mineral typically has been known as selenite. The fibrous massive assortment provides a silky lustre and is called satin spar; it really is translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050