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Cullinan Diamond. The Cullinan Diamond is the largest gem-quality rough diamond ever found, [2] weighing 3,106 carats (621.20 g), discovered at the Premier No.2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the owner of the mine. In April 1905, it was put on sale in London, but despite considerable ...
The John Hancock Center is a 100- story, 1,128-foot [ 7 ] supertall skyscraper located in Chicago, Illinois. Located in the Magnificent Mile district, the building was officially renamed 875 North Michigan Avenue in 2018. The skyscraper was designed by Peruvian-American chief designer Bruce Graham and Bangladeshi-American structural engineer ...
The Aon Center (200 East Randolph Street, formerly Amoco Building) [3] is a modern supertall skyscraper located in the Northeast corner of the Chicago Loop, Chicago, Illinois, United States, designed by architect firms Edward Durell Stone and The Perkins and Will partnership, and completed in 1973 [4] as the Standard Oil Building (nicknamed "Big Stan"). [5]
This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.
Chicago Mercantile Exchange was known as the Chicago Butter and Egg Board when it was founded in 1898, and futures available through the exchange were initially limited to agricultural products. [ 14 ] [ 15 ] [ 16 ] In 1919 the Board was restructured and the name changed to Chicago Mercantile Exchange, which reflected a new focus on commodities ...
McCormick Place is a convention center in Chicago. It is the largest convention center in North America. [2] It consists of four interconnected buildings and one indoor arena sited on and near the shore of Lake Michigan, about 2 mi (3.2 km) south of the Chicago Loop. McCormick Place hosts numerous trade shows and meetings.
Diamond production [2] (million USD) Country 2021 production 2020 production Botswana 4657: 2521 Russia 2643: 2255 Angola 1626: 1017 Canada 1512: 929 South Africa 1360: 959 Namibia
The Rock is the world's largest white diamond ever auctioned. It is a nearly colorless 228.31 carat pear-shaped diamond mined in South Africa c. 2000. The diamond is described as larger than a golf ball, and it was auctioned in 2022 for 21.9 million USD.