Gypsum, prevalent sulfate mineral of wonderful industrial significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-created crystals the mineral usually has long been referred to as selenite. The fibrous significant assortment includes a silky lustre and is termed satin spar; it really is translucent and opalescent and is valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050