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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 ...
A 5.05-carat (1.010 g) Emerald-cut red diamond formerly known simply as "Red Diamond". This is the second-largest known red diamond. It was cut from a 35-carat (7.0 g) piece of boart discovered near Lichtenburg, South Africa. It reappeared in 2007 after a 37-year absence from sight, and was purchased by Kazanjian Brothers Inc. —
The "Star of the East" is a 94.78-carat, pear-shaped, D-color stone of VS2 clarity grade. [1] Its exact origin is unknown, but it likely originated from India. [1] The Star of the East diamond was part of the collection of jewels belonging to the Ottoman Sultan, Abdul Hamid II, who ruled between 1876 and 1909.
On "Antiques Roadshow" we took a trip back to 1998 when a woman brought in a gorgeous diamond and ruby jewelry collection she inherited from her great aunt, who was married to a congressman back ...
The Hope Diamond is a large, 45.52-carat (9.104 g; 0.3211 oz), [a] [7] [8] [9] deep-blue diamond, studded in a pendant Toison d ’or. [1] It is a dark greyish-blue color under ordinary light due to trace amounts of boron within its crystal structure, and it exhibits a red phosphorescence under exposure to ultraviolet light.
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]
[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 ...
Its carat weight was originally 287.42 carats (57.484 g) in the rough when discovered in 1878 in the Kimberley mine in South Africa. It was cut into a cushion shape of 128.54 carats (25.108 g) with 82 [1] facets—24 more than a traditional round brilliant—to maximize its brilliance. The facet pattern features eight needle-like facets ...