Gypsum, common sulfate mineral of excellent business significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-developed crystals the mineral normally continues to be called selenite. The fibrous substantial assortment contains a silky lustre and is known as satin spar; it can be translucent and opalescent and it is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050