Gypsum, common sulfate mineral of excellent industrial significance, composed of hydrated calcium sulfate (CaSO4·2H2O). In properly-created crystals the mineral typically has long been identified as selenite. The fibrous substantial variety incorporates a silky lustre and is termed satin spar; it really is translucent and opalescent and is also valued for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050