An antique emerald, diamond and gold necklace. Photo Christie's Image Ltd 2013

The front suspending a graduated fringe of emerald beads with rose-cut diamond and sculpted gold spacers, joined by seed pearls to the openwork rose-cut diamond and sculpted gold band, to the cabochon emerald and rose-cut diamond plaque clasp, mounted in gold, late nineteenth century, 13 ins. Estimate $20,000 - $30,000. Price Realized $25,000

Christie's. MAGNIFICENT JEWELS. 15 October 2013. New York, Rockefeller Plaza - www.christies.com