Hydrothermal Anhydrite in veins is often hydrated to gypsum by groundwater in in close proximity to-area exposures. It is usually connected with the minerals halite and sulfur. Gypsum is the most common sulfate mineral.[seventeen] Pure gypsum is white, but other substances located as impurities might give a wide array of https://www.propanraya.com/id/produk/eco-gypsum-ee-4050