Whorl-Shaped Brooch, 550?650, Frankish, Copper alloy, gilding, niello, garnet, Overall: 1 5/16 x 5/16 in. (3.3 x 0.8 cm), Metalwork-Copper, Garnets, worked in the cloisonn? technique, featured prominently in the luxury jewelry of the Franks. Jewelers