The white-frosted Meinl Sonic Energy Crystal Singing Bowls are made of high-purity quartz to create a very pleasant aura with their sound and design. A long-lasting, spherical tone spreads when the singing bowl is gently tapped or rubbed creating a calm, soothing effect. All Crystal Singing Bowls are delivered with a silicone ring to avoid possible impact and to ensure the best resonance. The corresponding throat chakra promotes communication skills, inspiration, self-determination, independence, expression and integrity.