Hydrothermal Anhydrite in veins is commonly hydrated to gypsum by groundwater in around-area exposures. It is frequently 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 may well give a wide range of shades to https://www.propanraya.com/id/produk/eco-gypsum-ee-4050