Description American, 2nd qtr.-20th century.?? Art deco platinum ring (tested with x-ray metal tester) set with central old European cut diamond, slightly out of round, approx. .42ct., in a border of calibre cut blue sapphires and round diamonds.?? Total weight of smaller diamonds approx. .50ct. Clarity of center diamond VS, color I/J. Sz 7.75, 4gr.