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