Collection of Early Antique Rings?

by ann mcintyre
(united kingdom)

These antique rings I have collected over a thirty years...
the rings are all very heavy but the 2 silver ones have been cut and the gold ones though heavy are unmarked.
I have done much research and the antique silver ring might be a persian seal ring but not sure. Were rings from those eras ever unmarked or the marks have worn off? I am trying to find what eras they came from. I wonder if you could help me? thanks - annmac.