Meinl Sonic Energy 10" Solfeggio Crystal Singing Bowl 963 Hz (SOLCSB10-963) The white-frosted Meinl Sonic Energy Solfeggio Crystal Singing Bowls are made using ancient frequencies. Solfeggio frequencies are vibrations of sounds that are said to have a healing and health-promoting effect on our body, mind, and soul. Already in ancient times these frequencies were known and used for the treatment of physical and psychological diseases. For example,...