A magnificent diamond and coloured diamond pendent necklace. Photo Christie's Image Ltd 2013

The marquise-cut purplish pink diamond suspending a briolette diamond weighing 75.36 carats, joined to a briolette diamond neckchain, mounted in 18k rose and white gold,45.8 cm long (length adjustable). Price Realized $11,145,734

ACCOMPANIED BY REPORT NO. 11812033 DATED 18 APRIL 2013 FROM THE GEMOLOGICAL INSTITUTE OF AMERICA STATING THAT THE 75.36 CARAT DIAMOND IS D COLOUR, INTERNALLY FLAWLESS CLARITY, WITH EXCELLENT POLISH; ALSO ACCOMPANIED BY A SUPPLEMENTAL LETTER FROM THE GEMOLOGICAL INSTITUTE OF AMERICA STATING THE 75.36 CARAT DIAMOND HAS BEEN DETERMINED TO BE TYPE IIA. TYPE IIA DIAMONDS ARE THE MOST CHEMICALLY PURE TYPE OF DIAMOND AND OFTEN HAVE EXCEPTIONAL OPTICAL TRANSPARENCY. TYPE IIA DIAMONDS WERE FIRST IDENTIFIED AS ORIGINATING FROM INDIA (PARTICULARLY FROM THE GOLCONDA REGION) BUT HAVE SINCE BEEN RECOVERED IN ALL MAJOR DIAMOND-PRODUCING REGIONS OF THE WORLD. AMONG FAMOUS GEM DIAMONDS, THE 530.20 CARAT CULLINAN AND THE 105.60 CARAT KOH-I-NOOR, ARE EXAMPLES OF TYPE IIA

ALSO ACCOMPANIED BY A NOTE STATING THAT ACCORDING TO THE RECORDS OF THE GIA LABORATORY, THE 75.36 CARAT DIAMOND WAS CUT FROM THE 75.51 CARAT DIAMOND THAT WAS DESCRIBED IN THE GIA REPORT OF THE SAME NUMBER AND WAS NOTED AT THE TIME AS THE LARGEST BRIOLETTE, FLAWLESS OR INTERNALLY FLAWLESS, D COLOUR DIAMOND GRADED. THE 75.36 CARAT DIAMOND IS STILL LARGER THAN ANY OTHER DIAMOND WITH THE PREVIOUSLY MENTIONED NOTABLE CRITERIA

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