I was finally able to buy a ring. I found "just the right one" at the uber-classy and high-end tween jewelry store, Claire's boutique. It cost me $10, and it's so sparkly anyone who looks for more than a split second will probably know it's fake.
But I have to do what I can. So, here it is for your viewing pleasure. Actually, I would totally wear a ring like this--I love the three-stone rings, I think they are gorgeous.