A diamond necklace, by William Goldberg. Photo Christie's Image Ltd 2013

Designed as a graduated cluster of pear and oval-cut diamonds, mounted in platinum, 13 ins., in a William Goldberg navy leather case. Signed William Goldberg. Estimate:  $1,600,000 – $2,500,000

With twenty reports dated from 14 February to 6 March 2013 from the Gemological Institute of America stating that twenty of the diamonds, weighing from approximately 5.62 to 2.01 carats, range from D to F color and from internally flawless to SI1 clarity 

Christie's. NEW YORK MAGNIFICENT JEWELS AND THE PRINCIE DIAMOND. 16 April 2013. New York, Rockefeller Plaza.