Transparency: Gypsum Can vary from transparent to translucent, dependant upon the crystal formation and existence of inclusions. Transparent crystals let light to go through Evidently, although translucent specimens permit some light-weight passage but look cloudy or hazy. Gypsum can be found in hydrothermal veins, which are fractures in rocks full https://www.propanraya.com/id/produk/eco-gypsum-ee-4050