A Superb Five-Strand Natural Pearl Necklace. Photo: Christie's Images Ltd 2012

Of seventy-three, seventy-three, seventy-two, sixty-eight and sixty-three graduated natural pearls, measuring from approximately 4.10 to 11.35 mm, joined by a blue silk cord, length adjustable. Estimate $600,000 - $800,000

With report 62523 dated 7 March 2012 from the SSEF Swiss Gemmological Institute stating that the analysed properties confirm the authenticity of these three hundred and forty-nine saltwater natural pearls 

Christie's. Magnificent Jewels, 17 April 2012, New York, Rockefeller Plaza