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