CVNC 432Hz 8"A Third Chakra Eye Frosted Quartz Crystal Singing Bowl Amazon.com: CVNC 432HZ 6"A Third eye, 7"C Root, 8"F Heart Frosted CVNC 432HZ 6 12 Inch Set Of 7 PCS Frosted Chakra Quartz Crystal Singing 8 Best Crystal Singing Bowl for 2023 CitizenSide. Brand Name: CVNC Origin: CN(Origin) Diameter (cm): 20 30cm Model Number: 8CR Tone Number: 7 Weight (kg): 1. 33 Material: 99. 99% Quartz crystal Note: C D E F G A B any one Note Free accessory: 1pc Rubber mallet and Rubber O ring Application:: Sound therapy, yoga, meditation, healing Frequency: 440Hz or 432Hz