There have been some reader's requests to post more pectoral crosses and bishops' rings. I found a few, so here you go:
First two re-posts from the short-lived but intense "Bling-Wars" between Carolina and me:
Two pectoral crosses from the treasure of San Gennaro in Napoli
Then two gems that belonged to bishop Irigoyen of Pamplona (1768 to 1778):
His pectoral cross...
... and his ring.
Then some episcopal rings from the middle ages, which are kept in the Cluny Museum:
Finally three rings that I couldn't dentify:
This one with the amethyst has got to be my favorite one!
You also might want to go to this page, which has a whole lot of pics of pectoral crosses and episcopal rings, albeit very small ones...