I received the Connoisseurs Sonic Dazzle Stick for Jewelry as one of my Christmas gifts. I just used it for the first time and it worked beautifully. I was able to use the small head extremely well to clean both the outside and the underside of my rings. The bristles got into all the "nooks and crannies" to remove the built-up soap scum and hand lotion. The cleaning gel left no residue on the diamonds. I noticed on the box that it had received the Good Housekeeping Seal of Approval.