Gypsum, typical sulfate mineral of terrific professional value, made up of hydrated calcium sulfate (CaSO4·2H2O). In properly-created crystals the mineral commonly has become termed selenite. The fibrous substantial variety features a silky lustre and is known as satin spar; it truly is translucent and opalescent and is also valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050