Medical ball: 1.can purify and active the water 2.can absorb the pollution of water 3.can be a medicine for ... to the "healthy healing stone" is. Stone mineral water contain potassium, sodium, calcium, magnesium, phosphorus, titanium, vanadium, cobalt, manganese, ... copper and cobalt, molybdenum, sr can inhibit calculus formation, Calcium, magnesium and copper, zinc, selenium, iodine, titanium, nickel ...