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

Centering upon a detachable sugarloaf cabochon emerald, within a sculpted 18k gold and circular-cut diamond surround set with pear-shaped emeralds, mounted in 18k gold and platinum, circa 1965, in a David Webb black suede case, detachable emerald may be worn at the center of lot 355. Signed 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.