Just wanted to add that I use a Sephora FACE brush to clean my diamond rings and it's awesome. I use the dish detergent + warm water route but I find that this brush really gets in there and scrubs things clean but is still VERY VERY VERY gentle. Prefer this over any old "soft" toothbrush.
Just $5
maddsexycool.files.wordpress.com/2009/11/sephora-brush.jpg
I'll get Sparkle Sparkle now and can't wait to see the results!
where do you get the sparkle sparkle?