An unique coloured diamond and diamond pendent necklace, by Tiffany & Co. Photo Christie's Image Ltd 2013

Set with a pear-shaped fancy vivid blue diamond weighing approximately 2.70 carats, to the brilliant-cut green diamond surmount, spaced by a marquise-cut diamond, mounted in 18k white gold, 39.4 cm long. Price Realized $2,230,182

SIGNED TIFFANY & CO. 
ACCOMPANIED BY REPORT NO. 1152102905 DATED 3 DECEMBER 2012 FROM THE GEMOLOGICAL INSTITUTE OF AMERICA STATING THAT THE 2.70 CARAT DIAMOND IS FANCY VIVID BLUE, NATURAL COLOUR, VS1 CLARITY, WITH EXCELLENT POLISH 

Christie's . HONG KONG MAGNIFICENT JEWELS.28 May 2013. Convention Hall - http://www.christies.com