IF I COULD FIGURE OUT THE MANUFACTURER'S MARK THEN I COULD BE SURE IT IS STERLING I HAD TO USE A TEN POWER LENS TO SEE THEN A MAGNIFYING GLASS TO SEE MARK I DO NOT KNOW HOW TO PHOTOGRAPH IT I COULD SEE INSIDE EACH OF THE THREE BLOCKS: T, THEN WHAT LOOKS LIKE A HAND HOLDING LIGHTING, THEN A BIRD'S HE...