One of the coolest things I discovered is that you can clean jewelry with toothpaste. Freakin' A Man! It's so cool. You use regular toothpaste--like the white kind of paste, wet your piece, and rub it between your fingers or use an old or cheap toothbrush you are no longer using and scrub it up. Get it all scrubbed up and wash it off with water. Repeat if necessary. I have my ND necklace that I wore a lot, and it needed cleaning. I was amazed at how clean I could get it with simple toothpaste! It was awesome! :) So now you know, if you want to clean up a necklace or medallion or something, use toothpaste! If it doesn't work, you can always go to a jewelry store.