The MEINL Sonic Energy heart chakra crystal singing bowl immerses you in enriching vibrations with its high-purity quartz construction. You'll experience an extremely long-lasting resonance that spreads a pleasant, spherical tone through your entire surrounding area when gently tapping or rubbing the frosted white bowl. Whether practicing chakra healing, meditation, sound therapy, yoga, enhancing your home's feng shui or adjusting your emotional state, this versatile singing bowl provides the perfect accompaniment. The included silicone ring protects the 16"/40 cm diameter bowl from impact while ensuring optimal resonance tuned to A4/a' = 432Hz.