A few years ago, there was an Open University series on BBC2 called Rough Science. In it, scientists accompanied by Kate Humble were set challenges. In the third series
the team were in New Zealand. Most of the challenges were about gold -- panning for it, finding it with a metal detector they had to make, crushing ore and extracting the gold with mercury that they had to smelt from cinnabar (mercury ore). Ultimately, they had to make some jewelry. The jewelry was offered as a prize in an online competition. There was an easy multiple-choice quiz, but they tie-breaker was to come up with a challenge for the team in a subsequent series.
I was lucky enough to win, and the gold object eventually found their way to me wrapped in leatherette cloth inside an old tobacco tin (which was part of one of the challenges). These object are not really usable as jewelry, but I'm very fond of them as they bring back memories of good science programmes on the beeb. They don't make them like that anymore.