Pretty signed Tiffany blue and green enamel ring. Hallmarked "Tiffany 18K". The enamel is in deep cobalt blue and bright grass green. There are gold dots around the green enamel and down the curved surface. Ring size is 6 1/2. Because of the continuous enamel design, the ring cannot be re-sized. Width of the ring is 1/8". Condition is good. Weight is 5.2 grams. I would date this pretty ring at c 1950's.