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