When making the necklaces out of vintage earrings, I noticed how cute the earrings looked when combined with some of my vintage keys. I ended up playing with lots of combinations and taping them onto a file folder to figure out which ones I liked best.
I used the 2 part epoxy (tutorial here) to attach the earrings to the keys. I think the end results are darling!
If you are looking for more inspiration on how to remix vintage jewelry, here is a book that might provide more inspiration: Vintage Revised Jewelry
This last one combines a chandelier crystal with a vintage drop earring: