Gypsum, common sulfate mineral of fantastic industrial importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-formulated crystals the mineral normally has long been referred to as selenite. The fibrous enormous range incorporates a silky lustre and is termed satin spar; it's translucent and opalescent which is valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050