Diamond double collet and platinum tracelink chain necklace, spaced by 101 short tubular platinum links crimp-collet set to each side with a round brilliant cut diamond, approximately 12cts in all
Art Deco articulated diamond strap sautoir and aquamarine briolette pendant necklace, French c.1925, of geometric design, the diamond ribbon strands converging to a pronounced V-shaped front, suspending a large aquamarine drop of briolette cut,