Introducing the 12" Gem Infused Quartz Singing Bowl Note G Lapis Lazuli 440 Hertz. Use sound healing to restore balance, happiness, and peak performance. Treat mental illness, manage stress, and enhance productivity. Achieve a feeling of well-being. Our physical and emotional states are a blend of frequencies. The bowl's main feature is its ability to heal through sound. Experience the benefits of sound therapy with this exquisite bowl.