Do not be fooled by imitations or lower quality materials in the purchase of a singing bowl. Like all the other singing bowls in our Collection the Heart Chakra Crystal Singing Bowl is crafted from 99.99% pure American Quartz Crystal for purity and clarity of sound. Crystal clear transparent singing bowl is calibrated at D note attuned to the Heart Chakra. Use in your meditation, yoga or relaxation time for the ultimate experience with tonal therapy. Comes with striker mallet and O-ring to set upon. Instructions included.