I want to make one large (for me) single jewelry purchase at the end of the year, and I've been going through my options. One of the more interesting things I've considered is buying a single, gorgeous diamond, and either later have it set in a halo pendant setting or - a bit more "out there" - have it set as a stud earring, and wear it on one lobe (in a secnd hole I'd have to get pierced). If I want the highest quality diamond - color, cut, clarity - I coukd afford a 0.5 (mayyybe 0.6) carat stone. Part of the idea would be that if I ever tired of the pendant or earring I could later have the diamond re-set. What do you think? Any other ideas?