Transparency: Gypsum Can range from transparent to translucent, according to the crystal formation and presence of inclusions. Transparent crystals make it possible for mild to pass through Evidently, although translucent specimens make it possible for some light passage but surface cloudy or hazy. Impurities in refinery gypsum squander have, in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050