Gypsum, typical sulfate mineral of good professional importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-developed crystals the mineral usually is referred to as selenite. The fibrous significant selection includes a silky lustre and is referred to as satin spar; it is actually translucent and opalescent which is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050