Art Deco cabochon sapphire and diamond target ring in platinum

Art Deco cabochon sapphire and diamond target ring in platinum. Set with a round cabochon cut sapphire in a millegrain setting, encircled by a row of round eight cut diamonds in grain settings, all framed by a row of callibre cut sapphires in channel settings, to a circular target cluster ring with intricate settings, pierced sweeping gallery and met to either side with raised diamond set shoulders which terminated to a slim shank.