The white-frosted Meinl Sonic Energy Crystal Singing Bowls made of high-purity quartz create a very pleasant aura with their sound and design. Their long-lasting, spherical tone spreads when the singing bowl is gently tapped or rubbed so that the energy can be felt in the entire surroundings. All Crystal Singing Bowls are delivered with a silicone ring to avoid possible impact and to ensure the best resonance. This bowl has a size of 12" and vibrates in note D with 432 Hz. Sacral chakra also called Svadisthana: vitality, emotional balance, and self-esteem