Blemished Singing Bowls This is a discounted frosted quartz crystal singing bowl. We check every singing bowl thoroughly before it is sent out. This singing bowl did not pass our test because it either had small microchips around the rim, or it did not play strong enough with a suede striker. In either case, if you played these singing bowls with a silicon ball striker they are great singing bowls. This is why we are offering a free rubber ball striker with the purchase of any of these bowls. With your purchase, you will receive the bowl, an o-ring, and the rubber ball striker as pictured.