Who doesn't want to be like Kate Middleton? After all, the Duchess of Cambridge can do no wrong (I'm not-so-secretly obsessed with her). And her oval-cut sapphire engagement ring is just as perfect as the princess herself! Originally Princess Diana's, Kate Middleton's sapphire ring is regal, timeless and elegant. There's only one Kate Middleton, but with a sapphire ring, you can feel like a princess, too.