I know this is a bit out of anyone's price range but I love all things John Hardy, especially this necklace.
One of the first things I bought myself when I started receiving a grown up paycheck was the circle Atlas pendant from the Tiffany's collection. I'm not a huge Tiffany's girl but I do love the Atlas designs. My Heart added to my collection one of the rings shortly after we started dating. I'd love one of the cube pieces to be the next addition. Particularly these little stud earrings.
But the piece I've been coveting the most for the past 5 years or so will probably never be mine... oh, how I adore it. The Tiffany's Spider Web Cuff.
(Isn't it amazing?)