Gypsum, frequent sulfate mineral of excellent commercial importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-developed crystals the mineral typically has been referred to as selenite. The fibrous substantial wide range contains a silky lustre and is called satin spar; it truly is translucent and opalescent which is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050