Gypsum, typical sulfate mineral of wonderful professional great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-developed crystals the mineral generally has become termed selenite. The fibrous significant assortment provides a silky lustre and is named satin spar; it is actually translucent and opalescent and is particularly valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050