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The Winston Blue is the name given to what was the largest flawless vivid blue diamond [1] [4] [5] bought by Harry Winston, Inc. (a wholly owned subsidiary of The Swatch Group from January 2013) on May 15, 2014, from an anonymous person for $23.8 million at Christie's Geneva Magnificent Jewels sale. The approximately $1.8003 million per carat ...
The weight of a diamond is one of these variables that determines a diamond’s worth and is what the general public is most familiar with. The unit of measurement, called the carat, equals 200 ...
The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1] [2] and soon afterwards in many countries around the world.
The price was $6m above the $15m pre-sale estimate and more than three times the price of $6.5m it reached when it was last sold in 1993. The price fetched was a world record for a Golconda diamond and a world record price per carat for a colorless diamond. [1] [2] [3] [4]
Known as “Bleu Royal,” the 17.6-carat blue diamond is among the rarest ever to be unearthed, according to Christie’s auction house. ‘Internally flawless’ blue diamond could fetch $50 ...
The cushion-shaped flawless fancy vivid pink type IIa diamond was sold by Sotheby's Hong Kong on October 7, 2022, for $392 million Hong Kong dollars (US$49.9 million), setting a world record for the highest price per carat for a diamond sold at auction. [64] [65] [66] —
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