Hydrothermal Anhydrite in veins is commonly hydrated to gypsum by groundwater in in the vicinity of-surface area exposures. It is usually connected to the minerals halite and sulfur. Gypsum is the most typical sulfate mineral.[17] Pure gypsum is white, but other substances discovered as impurities may perhaps give a wide https://www.propanraya.com/id/produk/eco-gypsum-ee-4050