handcrafted sterling silver piece made sometime between 1950 and 1980 by Mexican silversmith Rancho Alegre. was my mother's. amazing silver work. fire agate is subtly iridescent. tarnish is normal given its age and could be brightened but would recommend gentle cleanser. see photos for size. my guess is about 6.5 because im a 7 and its about a half size too small, but id look at photos to be sure.