The mineral stones are called Andesite and are mined deep beneath the ocean off the coast of South Korea. The mineral stones contain germanium, which is health giving and cancer preventing. Germanium does not contain heavy metals but absorbs heavy metals, toxic-ions, and impurities. They are rich in mineral supplements and have been widely used in health related products for centuries. Mineral stones also aid in the oxygenation of water and the adjustment of the pH to mild alkaline. These minerals are porous which slowly release minerals such as germanium, calcium, potassium, magnesium and iron to name a view.