Transparency: Gypsum Can range from clear to translucent, depending upon the crystal formation and presence of inclusions. Clear crystals permit light to pass through Plainly, although translucent specimens allow some mild passage but show up cloudy or hazy. Gypsum happens in considerable beds related to other evaporite minerals (e.g., anhydrite https://www.propanraya.com/id/produk/eco-gypsum-ee-4050