Gypsum, widespread sulfate mineral of wonderful industrial significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In effectively-formulated crystals the mineral normally has become termed selenite. The fibrous substantial wide variety has a silky lustre and is termed satin spar; it's translucent and opalescent which is valued for ornaments and jewelry. A https://www.propanraya.com/id/produk/eco-gypsum-ee-4050