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