Crystal singing bowls: The healing sound world of crystals The beautiful crystal singing bowls are not only aesthetically appealing, but their effect can also be powerful instruments to promote harmony and balance. In recent years, they have gained popularity and are now an integral part of sound healing, yoga and meditation. It is assumed that each key is connected to one of the seven main chakras and that the sound of a corresponding crystal singing bowl affects the respective chakra. 432 Hz crystal singing bowl approx. 25 cm (tone E): The solar plexus chakra, which stands for personal power and self-esteem, is often associated with the key of E. Playing this bowl should help to strengthen our self-confidence and connect our inner strength. With clapper and silicone ring for positioning quartz crystal singing bowl different sizes and tonalities available