Older Native American ring of tested sterling silver, a square shape turquoise and small round coral, nice three feather silver design, although we see an engraved A310 on this ring, we do not think this was put there by the maker and rather by a prior owner for identification in a collection. The ring is size 5 & 1/2 and the top measures 1" long. As to the stones, we are going to assume both are treated or stabilized, the small size making it more difficult to tell and frankly they were put there only to accent the beautiful silver work on this ring. I collect Native American jewelry, especially rings, and when I wear them, I wear four on each hand, meaning 8 rings in all sizes too. And finally my collection has grown too big to keep all of them. A lot of our listings are from my personal collection, all hand selected with care.