Transparency: Gypsum Can range from transparent to translucent, based on the crystal formation and presence of inclusions. Clear crystals allow mild to go through Plainly, even though translucent specimens allow for some mild passage but seem cloudy or hazy. Gypsum is calcium sulfate, a In a natural way transpiring mineral. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050