&#34;An early 20th century aquamarine and diamond necklace.     The front composed of three delicate quatrefoil clusters, millegrain-set throughout with cushion-shaped and oval-cut aquamarines and old brilliant and single-cut diamonds, connected by similarly set single-cut diamond foliate swags, suspending a large cushion-shaped aquamarine pendant, mounted in platinum and yellow gold, on a fine trace-link chain.  Via Bonhams.&#34;