Just received this a couple days ago and used it for the first time today. I cleaned an amethyst & diamond pendant on a gold chain, a garnet and gold tennis bracelet and a couple gemstone and gold rings. Yowzah!! I couldn't believe the difference!! I had NO idea my jewelry was so dull and dirty until I gave it a 30 second dunk in this stuff. I used the little brush that comes with it to get into the tiny little areas around the prongs, etc, gave it a rinse and dried with a clean, soft microfiber towel, and the shine was amazing! I came back to order their sterling cleaner as well. Great product!