Gypsum, typical sulfate mineral of excellent business significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-produced crystals the mineral frequently has become termed selenite. The fibrous significant wide range includes a silky lustre and is called satin spar; it really is translucent and opalescent which is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050