Gypsum, widespread sulfate mineral of fantastic professional worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-developed crystals the mineral typically has long been known as selenite. The fibrous large range features a silky lustre and is referred to as satin spar; it can be translucent and opalescent and it is https://www.propanraya.com/id/produk/eco-gypsum-ee-4050