Transparency: Gypsum Can range between clear to translucent, depending upon the crystal formation and existence of inclusions. Clear crystals allow for light to pass through clearly, though translucent specimens allow some light passage but look cloudy or hazy. Gypsum can be found in hydrothermal veins, which can be fractures in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050