Gypsum, widespread sulfate mineral of great industrial value, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-formulated crystals the mineral typically continues to be known as selenite. The fibrous massive range provides 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