Mineral stone is mined between 330 and 600 meters below sea level on an unpolluted resources. The mineral stone contains Germanium also absorbs heavy metal, toxins. Odors and impurities, they continuously release more than 20 kinds of ionized minerals for 5 years. Gradually depleting in size. The highly porous mineral stone aids in the oxygenation of water and in the adjustment of the PH of water to mild alkaline.