Hydrothermal Anhydrite in veins is often hydrated to gypsum by groundwater in around-area exposures. It is frequently connected to the minerals halite and sulfur. Gypsum is the most typical sulfate mineral.[seventeen] Pure gypsum is white, but other substances discovered as impurities might give a wide range of hues to nearby https://www.propanraya.com/id/produk/eco-gypsum-ee-4050