These high quality clear crystal singing bowls are made of over 99.9% quartz crystal.The sound is pure and relaxing, Excellent for meditation and healing.Perfect pitch help with the meditation and enlarge the healing. Crystal singing bowls are associated with the Chakra system of the human body, and correspondingly to the musical scale. Chakra is Sanskrit for "wheel." Chakras are described as being shaped like multicolored lotus petals or spoked wheels which whirl at various speeds as they process energy. They are described in Hindu and Buddhist yogic literature. Both systems describe them differently, and their descriptions vary in Western literature as well. The addition of crystal singing bowls to your Reiki practice and meditations can help you journey through the chakras deep into the very atoms and cells of the body. Experience the healing power of crystal energy bowls: Balance your body, mind and spirit Open and clear your energy centers Experience deep relaxation Align with your soul purpose Improve feng shui and make you in balance and harmony with your environment