As healing stones or health stones inorganic or fossil substances, especially minerals are called, which are said to have a healing effect in diseases or to improve the condition (gemstone therapy, lithotherapie).
These effects can be achieved, for example, after "cleansing" and "charging" the healing stones by placing them on affected parts of the body, setting up larger stones, immersion in water or creams or wearing them on the body. Scientific evidence of a healing effect does not exist.
Source: Wikipedia