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AN EXCEPTIONAL DIAMOND AND COLOURED DIAMOND NECKLACE, BY NIRAV MODI
AN EXCEPTIONAL DIAMOND AND COLOURED DIAMOND NECKLACE, BY NIRAV MODI Centering upon a pear-shaped diamond weighing 12.29 carats, within a pear-shaped diamond surround, extending to a highly flexible lattice-work graduated band of rectangular-shaped intense to vivid pink diamonds, joined by navette-shaped links assembled by combining two calibré-cut crescent-shaped diamonds, each link is further enhanced by a brilliant-cut intense to vivid pink diamond, mounted in 18k white gold, 29.0 cm long, in red leather Nirav Modi case Signed and with maker's mark for Nirav Modi Accompanied by report no. 5121510788 dated 9 September 2010 from the Gemological Institute of America stating that the 12.29 carat diamond is D colour, internally flawless clarity Accompanied by a supplemental letter from the Gemological Institute of America stating the 12.29 carat diamond has been determined to be a 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 Accompanied by report no. 1009055 dated 13 September 2010 from the Gübelin Gemmological Laboratory stating that the 12.29 carat diamond is D colour, internally flawless clarity Accompanied by a note from the Gübelin Gemmological Laboratory stating that based on its infrared spectrum, the 12.29 carat diamond is classified as a Type IIa. Diamonds are classified into two fundamental groups based on the relative presence or absence of nitrogen incorporated into the crystal structure, as determined by the infrared spectrum. Type I diamonds contain appreciable concentrations of nitrogen, whereas Type II diamonds are chemically very pure and do not reveal infrared absorption characteristics related to nitrogen. A further separation of these two groups includes Type Ia (nitrogen atoms present in pairs or groups), Type Ib (isolated nitrogen atoms), Type IIa (no measurable traces of nitrogen) and Type IIb (traces of boron) Accompanied by an appendix from the Gübelin Gemmological Laboratory stating that the 12.29 carat diamond possesses an antique cutting style which is rarely encountered in the gem trade today. In addition, this diamond is classified as type IIa (a chemically very pure type of natural diamond). It displays a colour and degree of transparency which are particular to the finest of these unique gemstones. Diamonds of this type, exhibiting an antique cutting style as well as a superior quality, are very rare and will most certainly evoke references to the historic term of "Golconda" The necklace is also accompanied by thirty-four reports from the Gemological Institute of America stating that thirty-four rectangular and square-shaped pink diamonds weighing from 1.03 to 0.22 carats (total weight: 16.39 carats) range from fancy intense, fancy deep to fancy vivid pink to purplish pink, natural colour, VVS1 to I1 clarity Additionally, it is also accompanied by fourteen reports from Gemological Institute of America stating that the fourteen pear and modified pear-shaped diamonds weighing from 2.03 to 0.67 carats (total weight: 15.85 carats) range from D to F colour, internally flawless to VS2 clarity The total weight of the pink diamonds is 22.80 carats and the total weight of the colourless diamonds is 86.90 carats