Sotheby's presents "The De Beers Cullinan Blue", a stunning blue diamond that is not only a natural treasure, but also the most precious blue diamond ever on the auction site, with an estimated value of over US$48,000,000 / HK$380,000,000. This rare 15.10 ct rectangular Step-Cut blue diamond, from an extraordinary rough discovered in April 2021, was cut and polished with exquisite craftsmanship to become the largest Fancy Vivid blue diamond ever auctioned, and the largest internally flawless step-cut Fancy Blue diamond ever identified by the Gemological Institute of America (GIA). Such an important blue diamond is extremely rare, so far there have been only five blue diamonds of more than 10 carats on the auction, but they have never exceeded 15 carats like "De Beers Cullinan Haoyu Blue", so rare to appear on the auction scene, it is really a grand ceremony that attracts worldwide attention.
"De Beers Coolinan Haoyu Blue" will lead the Hong Kong Sotheby's Luxury Week auction, which will be auctioned in a single lot in late April 2022 (auction dates will be announced later). With such a top-notch gem sure to attract the attention of collectors around the world, "De Beers Coolinan The Blue of The Universe" will be exhibited on a world tour, first at Sotheby's in New York, followed by London, Dubai, Shanghai, Beijing, Shenzhen, Taipei and Singapore (details and dates will be announced later).
The blue diamond was discovered in 2021 at the Cullinan Mine in South Africa and is one of the few sources of extremely rare blue diamonds available today. Over the past year, DE BEERS has worked with Diacore, one of the most experienced diamond cutting masters, to cut and polish this amazing rough blue diamond, cullinan Blue.
"De Beers Coolinan Haoyu Blue" obtained the highest color grade in the color evaluation of fancy color diamonds, which is invaluable. Less than 1% of blue diamonds rated by the Gemological Institute of America (GIA) fall into this grade. In addition, this diamond has an extreme clarity of "internally flawless" and is extremely polished, and is less than 0.5% type IIb diamonds.
This blue diamond also adds to its charm by the classic rectangular step cut – rectangular cuts are common in white diamonds with higher color clarity and are particularly sought after on rare fancy color diamonds. According to the Gemological Institute of America (GIA), "Diamonds that achieve Fancy Vivid grades in a square cut are extremely rare because most other fancy cuts enhance the color saturation of the diamond at a positive upward angle than the rectangular step cut." For a cut diamond to reach a Fancy Vivid grade, there are extremely high requirements for the color of the diamond itself, which must be more intense than other cut-shaped diamonds. ”
Pay attention to China Gem magazine, timely obtain authoritative jewelry industry information, and accurately locate the jewelry consumer market