Vintage Old Pawn Large round Sterling Silver Turquoise Clip on Shadowbox Earrings. Gorgeous sky blue turquoise in a shadowbox setting. The natural darkened beauty of the patina against the turquoise is stunning. They measure 1" and weigh 15.3 grams. Hallmarked sterling, a 4 hallmark and a pat. number 156452 . The clips are tight and secure. Securely set turquoise gemstones. No damage. Just Fabulous!