Chinese Therapy Ball Necklace. A legend recalls how the soft tinkling sound of the ball, which is unique to each pendant, has the magical ability to summon the guardian angel of its wearer, protecting him or her and accompanying the wearer throughout his or her life. The Harmony Ball was traditionally given to pregnant women, who would wear it throughout their pregnancy as an amulet to protect their baby. After the birth, the soft and familiar tinkling sound of the bell would settle the newborn, helping him or her to sleep by recalling the gentle warmth and care of the womb. View Photos For Further Details.