8" 432HZ A Note Blue Tourmaline Perfect Pitch Crystal Singing Bowl. Blue tourmaline, especially when used in a sounding bowl, carries a calming and spritually uplifting energy. It is believed to enhance communication, clarity, and insight, making it a powerful tool for meditation and inner truth. Spiritually, it resonates with the throat and third eye chakras, promoting authenic expression and intuitive awareness. When played in a sounding bowl, blue tourmaline's vibration it promotes emotional healing, reduce stress, and open pathways to higher consciousness.