A 4-C Perfect Diamond unveiled at Sotheby's

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Today Sotheby’s London unveiled an exceptional 102.34 carat round brilliant-cut diamond. A masterpiece of nature to celebrate the London Salon’s 1st anniversary.

Classified as the only known round brilliant-cut diamond over 100 carats to have achieved perfection in the “four Cs” (Colour, Clarity, Cut and Carat), this fabulous gem is the world’s largest-known round, D colour, Flawless diamond ever to come to the Market.

102.34-carat D colour Flawless diamond - Sotheby's Diamonds — 102.34-carat D colour Flawless diamond – Sotheby’s Diamonds

The only stone of its kind ever graded by the GIA (Gemological Institute of America), the diamond has achieved the highest rankings under each of the criteria by which the quality of a stone is judged (‘the four Cs’).

The diamond is D colour (the highest grade for a white diamond); of exceptional clarity (it is completely flawless, both internally and externally), and has excellent cut, polish and symmetry.

As with the famous Cullinan I and Koh-i-Noor diamonds, which are part of the British Crown Jewels, the stone is part of the rare subgroup comprising less than 2% of all gem diamonds, known as Type IIa. Diamonds in this group are the most chemically pure type of diamond and often have exceptional optical transparency.

Describing the stone, which is available for private purchase through Sotheby’s Diamonds and will be on view to the public in Sotheby’s New Bond Street Galleries on 8 and 9 February 2018, Patti Wong, Founder and Chairman of Sotheby’s Diamonds, said:

“This stone is over 100 carats of flawless perfection. In the course of my long career, which has brought me close to some of the greatest stones the earth has ever yielded, I have not encountered anything quite like this. With its outstanding weight, its perfect colour, clarity and cut, it is a masterpiece of nature brought to life by human hand, blazing with a brilliant firework-like display of almost every colour on the spectrum – mesmerising to behold. It is a huge privilege to mark the first anniversary of our London salon with the exhibition of such a superlative stone.”