An Art Deco diamond and platinum ring of tapered bypass design, the larger, oblong end centering three, graduated Old-European-Cut diamonds in a diamond surround, the smaller end terminating in a row of prong-set diamonds. Monture Cartier. #50-20513. Atw diamonds 1.58 cts (S1-I1, F/G), center stone 0.6 ct (I1, G)

This Cartier construction is distinguished by its sculptural bypass design, in which two diamond-set terminals sweep gracefully past one another. The larger, oblong terminal centers three graduated Old European-cut diamonds, framed by a surround of smaller diamonds that accentuates its rounded silhouette. Opposite, a slender, tapering row of diamonds curves around the finger, completing the graceful composition. The elevation of the larger terminal and the overall asymmetry lend the ring a sense of movement, as though the platinum band were actively encircling the finger. Combining the romantic character of Old European-cut diamonds with the bold, sculptural qualities of Art Deco design, the ring feels at once elegant and dynamic.