Gypsum, common sulfate mineral of great commercial value, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-designed crystals the mineral normally has been termed selenite. The fibrous huge range has a silky lustre and is called satin spar; it is actually translucent and opalescent and is also valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050