2 SW Silver Rings; a Coral, an' a Zuni Wannabe?

They're both small; I don't have a ring gauge but both are about 16mm ID. These came to me with a couple of bracelets, which I'll post next...all SW style but otherwise look pretty generic. The coral ring appears to have been re-sized. I'm hoping one of you joolies will see something that might help localize to a tribe, or an area...an' the Zuni-looking ring is the only signed piece among them. All comments are most welcome...thanks for lookin'!