Gypsum, widespread sulfate mineral of excellent professional importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-created crystals the mineral generally has become referred to as selenite. The fibrous huge assortment contains a silky lustre and is termed satin spar; it's translucent and opalescent and is particularly valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050