1.We produced by high pure quartz, the purity more than 99.99%.Each singing bowl looks bright and not very very white, the sond is sound is soothing, strong, and penetrating .2.8 inch Crystal Singing Bowl x 1,Suede Striker x 1,O-ring x 1,Crystal Singing Bowl Carrying Case x 1.3.Deep Meditation, Sound Therapy, Yoga, spirituality, energy practitioners, massage therapists, psychotherapists,Reduce stress and anxiety, room decoration, prayer, Improve sleep quality, balancing body chakra, More mindfulness, happiness and well-being,and so on.4.Crystal Singing Bowl helps you to heal, defeat disease, lower pain levels, while releasing positive energy. Healing processes are initiated through entraining our brainwaves to synchronize with the perfect resonance of the bowls. You can easily play peaceful and mesmerizing tones on this unique Tibetan singing bowl to create a type of energy medicine that reduces stress and promotes spiritual, mental and physical healing.