Gypsum, popular sulfate mineral of terrific professional great importance, made up of hydrated calcium sulfate (CaSO4·2H2O). In well-designed crystals the mineral normally has long been termed selenite. The fibrous significant assortment has a silky lustre and is called satin spar; it is actually translucent and opalescent which is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050