This shadow box pendant is 1 1/2" in diameter and is set with a small turquoise cabochon. The pendant is stamped with a feather, the initials "HC" and "IHMS\S". There is not a sterling stamp so I gave the pendant the acid test and it passed. The IHMS\S may mean "Indian Hand Crafted Sterling Silver". If so the pendant likely dates back to the 70s. I bought it years ago from another dealer and added it to my personal collection. I seldom wore it in favor of my shadow box squash blossen necklace, so I decided to let it go.