Gypsum, frequent sulfate mineral of great commercial relevance, made up of hydrated calcium sulfate (CaSO4·2H2O). In effectively-made crystals the mineral commonly has actually been named selenite. The fibrous substantial wide variety includes a silky lustre and is termed satin spar; it can be translucent and opalescent and is also valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050