Gypsum, popular sulfate mineral of fantastic industrial worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-made crystals the mineral commonly has long been termed selenite. The fibrous significant wide variety provides a silky lustre and is referred to as satin spar; it is translucent and opalescent and is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050