Gypsum, typical sulfate mineral of terrific commercial relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-produced crystals the mineral commonly has long been named selenite. The fibrous significant wide variety has a silky lustre and is referred to as satin spar; it is translucent and opalescent and is particularly valued https://www.propanraya.com/id/produk/eco-gypsum-ee-4050