After tinkering with the Roman coins, I started searching through my piles and finally found the coins again. I ended up with a simple cold connection to add the coin to a sterling bracelet.
This should be tough enough for everyday wear - I soldered the links for strength and since it's entirely made of metal it doesn't need any special care. (I have a special hatred for soldering links, but sometimes it has to be done.)
I like the copper rivet with the coin and the sterling - maybe there are more of these in my future.