Transparency: Gypsum Can vary from clear to translucent, depending on the crystal formation and existence of inclusions. Clear crystals permit light-weight to pass through Evidently, while translucent specimens enable some mild passage but show up cloudy or hazy. Gypsum are available in hydrothermal veins, which might be fractures in rocks https://www.propanraya.com/id/produk/eco-gypsum-ee-4050