Gypsum, frequent sulfate mineral of fantastic business significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-formulated crystals the mineral frequently has long been named selenite. The fibrous massive selection provides a silky lustre and is named satin spar; it really is translucent and opalescent and is particularly valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050