Transparency: Gypsum Can range between clear to translucent, based on the crystal formation and existence of inclusions. Transparent crystals allow light to pass through Evidently, though translucent specimens let some light-weight 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