Transparency: Gypsum Can vary from transparent to translucent, based on the crystal formation and presence of inclusions. Transparent crystals allow light to go through Evidently, though translucent specimens allow for some mild passage but show up cloudy or hazy. Gypsum is calcium sulfate, a The natural way taking place mineral. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050