I'm not really into jewelry...
But I do have an original Junghans Mega atomic wrist-watch, a gift - which is pretty neat to me. The first wrist-watch to have a built-in radio that syncs with the atomic clock. Every night at 2 am (or at the push of a button), the watch resets, with the hands dancing around, resyncing to the atomic clock in Boulder, CO to within 1/10th of a second. (Kind of neat that it is a fully digital watch with an analog movement - the hands don't spin the way a conventional analog watch does, but snap from place to place). To set the watch, all you do is pick your current time zone +/- GMT.
It may not have gold or dimonds - but it represents a new age in time-keeping.
- Lime