Each birth bone is encrusted with 100 stunning Swarovski  crystals in the colors of your pup's birthstone. That's right, both the front and back are covered with the sparkle. Though, at $40 a pop , I'd be worried the charm would pop off my dog's collar on our evening walkies, you could add this to your own necklace or key chain instead. The only question is . . . would you?