Vintage Tiffany Ring Sterling Silver Seventies

1970’s sterling silver cocktail ring featuring a large bone stone set in an architectural design. Stamped Tiffany & Co and 925. Elegant sculptural styling. The geometric motif continues along the band. Size 5&1/2. Some minor age related wear present, please view photos closely as both materials are soft. The bone? Stone has a nice creamy color with organic subtle striations. I appears to have a slight surface scratch but not very noticeable and likely just a natural occurrence. The structure of the ring is totally solid but we do see some slight surface wear around the edges. All in all we consider it in very good pre loved condition. We are not sure which artist within the fabulous cache of designers at Tiffany is responsible for this piece. If you have a clue, please share. This was my Mother’s ring and unfortunately I cannot ask her about origin. Nonetheless, it is a Unique statement piece. Unusual. Vintage Tiffany.