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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 gem was sold at her estate sale auction for over $2 million. The Liberator, four gems weighing 38.88, 18.12, 8.93 and 1.44 carats (7.776, 3.624, 1.786 and 0.288 g; 0.2743, 0.1278, 0.0630 and 0.0102 oz), D color, three emerald cuts and a marquise, respectively. Winston purchased the 155 carats (31.0 g; 1.09 oz) Venezuelan crystal in 1943 and ...
in rose diamonds surrounded by a wreath of trefoils in emeralds, the whole enclosed by a circle of large single Brazilian stones of the finest water, surmounted by a crowned harp in diamonds and loop, also in Brazilian stones. Total size of oval 3 by 2 + 3 ⁄ 8 inches; height 5 + 5 ⁄ 8 inches. Value £16,000. (equivalent to £2,140,000 in 2023).
Discovered in 2015, it is the 5th largest diamond ever discovered at the Crater of Diamonds State Park, Arkansas Identified as a Type IIa crystal, the 8.52 carat diamond was cut and polished by Mike Botha into a custom-designed 4.605 carat Triolette shape during a week long event in North Little Rock and was graded a D IF, 0 Polish & 0 Symmetry ...
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The Golconda diamondiferous region is located in the Southern Indian peninsular shield, [2] which was formed during the process of proterozoic and Insular India. [3] The region is spread over 50,000 km 2 (19,000 sq mi), within the sediments of the Krishna-Pennar river basin and Deccan Traps, [2] and contains 120 out of the 150 kimberlite pipes in India. [4]
The original rough diamond was found in 1966 in the Premier Mine in South Africa, weighing 241 carats (48.2 g). Harry Winston cut it into the shape of a pear weighing 69.42 carats (13.884 g). [1] At the time of sale in 1969, the diamond was set in a platinum ring with two smaller diamonds on either side. [2]
[2] In 1953 the GIA developed its International Diamond Grading System and the "four Cs" (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. [2] As of 2024, the institute is headquartered in Carlsbad, California, and operates in 13 countries, with 11 campuses, 9 laboratories, and 4 research ...