Crystal Singing Bowls are made from 99.99% pure crystal, Quartz crystal singing bowl produced by high pure quartz crystal, it is an excellent for meditation and Healing. Beautiful, Clear, Deep, Amazing and Rich Vibrational Resonance with the power to Health. The playing of the chakra-tuned Singing Quartz Crystal bowls angelic tones and their rippling vibrations can have a profound personal and healing effect. Singing bowl gift: One Rubber Mallet and One O-ring and.