An 13.07 carats Colombian emerald and diamond pendent necklace. Estimate $60,000 - $80,000. Price Realized $73,000 . Photo Christie's Image Ltd 2007

The detachable pendant set with a cabochon emerald weighing 13.07 carats within a pear-shaped, marquise and brilliant-cut diamond quatrefoil surround to the brilliant-cut diamond surmount and link chain, 40.0 cm long

Accompanied by report No. 0511007 dated 15 November 2005 from the Gübelin Gem Lab stating that the emerald is of Colombian origin, with indications of minor clarity enhancement 

Christie's. CONTEMPORARY JEWELS AND WATCHES, 1 November 2007, Jumeirah Emirates Towers Hotel