Vintage Navajo Ring Set of Three Marked Possible Turquoise Coral Native Jewelry

This listing is for three Navajo rings. No markings of sterling or 925 were noted.

However, there are other markings. Please refer to the pictures to see these markings. Markings were noted on 2/3 rings.

The third ring has wear on the back. I didn't want to clean because I didn't want to damage ring. No marking noted on this ring.

---