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