Gypsum also occurs in crystal type, With all the two commonest versions remaining huge obvious crystals that will often be termed selenite, and fibrous crystals, often called satin spar. ‘Selenite’ will be the Greek term for moon, and refers back to the crystals perfectly-created pearl-like luster that can reflect a https://www.propanraya.com/id/produk/eco-gypsum-ee-4050