Can anyone direct me to a reputable online source for vintage ring semi-mounts? I have a 1/2-carat diamond that needs a lovely home for a right-hand ring.
JBEG have some amazing pretties and from what I've heard, they're very good to work with!
Another option is http://www.doverjewelry.com. Some of their stuff is vintage, some of it is more modern. A lot of it is overpriced, but if you have a look around maybe you'll see something you like...?
Good luck with the search and let us know what you find!