Few years ago...
Necklace broke. The point is, I really like that necklace, so (as you assume) I didn't want to throw it away. As I bought hundred rings I decided to twist that necklace into a ring.
This is how I did it:
1. Paint the free rings in any color you want to. I decided black.
2. After it's dry, glue your pendants on the rings (I used two-part epoxy adhesive for metal-but I think that normal two-part adhesive will work just fine).
3. After 1 day It's finally done!