Gypsum, widespread sulfate mineral of great professional relevance, composed of hydrated calcium sulfate (CaSO4·2H2O). In well-developed crystals the mineral usually is termed selenite. The fibrous significant selection provides a silky lustre and is referred to as satin spar; it is translucent and opalescent and is also valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050