Gypsum, popular sulfate mineral of fantastic commercial value, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-produced crystals the mineral typically has long been referred to as selenite. The fibrous substantial wide range provides a silky lustre and is known as satin spar; it's translucent and opalescent which is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050