Vintage Turquoise Sterling Ring Southwestern Indian Sz 5.5A bright blue turquoise gemstone set in unmarked sterling silver is the feature of this vintage Southwestern Indian made ring, circa 1970. The vintage ring is hand wrought from unmarked sterling silver and bezel set with a blue turquoise cab with dark veined matrix, along with a rope twist frame and split shank. It measures a size 5&1 2 on my ring mandrel and weighs a total of 3. 7 grams.