A diamond, emerald and ruby brooch, by David Webb. Photo: Christie's Images Ltd 2013.

Set at the center with a detachable pear-shaped cabochon emerald within a circular and old European-cut diamond surround, to the carved cabochon ruby plaque with rectangular-cut emerald and circular-cut diamond detail, mounted in platinum and 18k gold, with pendant hook for suspension, central plaque is interchangeable with a cultured pearl, measuring approximately 13.25 mm, within a circular-cut emerald and diamond surround, mounted in gold and platinum, circa 1964, in a David Webb black suede case. Brooch signed Webb for David Webb. Estimate:  $25,000 – $35,000 

THE ESTATE OF THE HONORABLE NOREEN STONOR DREXEL, NEWPORT, RHODE ISLAND

Christie's. MAGNIFICENT JEWELS. 15 October 2013. New York, Rockefeller Plaza.