The largest D-color flawless diamond to ever come to auction was sold in Geneva

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With a bidding starting at 20 million francs, the necklace was finally sold to a telephone bidder, who wished to remain anonymous. ‘Over our 251-year history, Christie’s has had the privilege of handling the world’s rarest and most historic diamonds,’ says Rahul Kadakia, International Head of Christie’s Jewellery department.

The-Art-of-Grisogono
“The Art of Grisogono”

Early spectrographic testing at the Gemological Institute of America (GIA) in New York declared the stone to be a D-color. D is the highest colour grade attributed to a diamond, indicating that the stone is completely colorless, and thus extremely rare. The diamond was cut from a 404-carat rough discovered in February 2016 in the Lulo mine in Angola. Given the name, “4 de Fevereiro,” it is the 27th biggest rough white diamond ever discovered and the largest in Angola. Fawaz Gruosi, founder of De Grisogono, purchased the rough diamond. On 29 June 2016, after months of analysis, 80-year-old master diamond cleaver Ben Green was ready to go to work. A diamond cutter since 1964, Green is respected as the number-one cleaver in the world. A team of 10 diamond-cutting specialists worked a long time to transform the diamond in a jewerly. The cutting process alone took 11 months.

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