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  2. Diamond Trading Company - Wikipedia

    en.wikipedia.org/wiki/Diamond_Trading_Company

    The Diamond Trading Company (DTC) is the rough diamond sales and distribution arm of the De Beers Group. The DTC sorts, values and sells about 35% of the world’s rough diamonds by value. [1] The DTC has a combination of wholly owned and joint venture operations in South Africa (DBSSSA), Botswana (DTCB and DBGSS), and Namibia . [2]

  3. Graff (jewellers) - Wikipedia

    en.wikipedia.org/wiki/Graff_(jewellers)

    The Delaire Sunrise is, at 118.08 carats, the largest square emerald cut Fancy Vivid Yellow diamond in the world. Discovered in 2008 at an alluvial mine in South Africa, the 221.81 carat rough diamond. When Laurence Graff unveiled the finished diamond, he named it "the Delaire Sunrise". [19] The Graff Pink was acquired by Graff in November 2010.

  4. List of largest rough diamonds - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_rough_diamonds

    Eventually sold to I. K. Gulland of London, where it was broken up into small pieces as industrial diamond drills. [7] 3106.75: Cullinan Diamond South Africa: Premier Mine: 1905: British Crown (I and II) and Charles III (III–IX) The largest gem-quality diamond ever discovered. 2492 [8] Motswedi Botswana: Karowe Mine [9] 2024: Lucara Diamond ...

  5. Cullinan Diamond - Wikipedia

    en.wikipedia.org/wiki/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.

  6. De Beers - Wikipedia

    en.wikipedia.org/wiki/De_Beers

    International Institute of Diamond Valuation. The International Institute of Diamond Valuation (IIDV) was launched by De Beers Group in March 2016. Operating in partnership with diamond jewellery retailers, it provided a reselling service for all diamonds, regardless of value. [103] [104] [105] In April 2019, De Beers closed its IIDV division ...

  7. Petra Diamonds - Wikipedia

    en.wikipedia.org/wiki/Petra_Diamonds

    The Cullinan mine continues to produce large stones. The Cullinan Heritage, a 507-carat (101.4 g) white diamond, was discovered in September 2009. This stone was the 19th biggest uncut diamond ever found and was sold in February 2010 to Chow Tai Fook Jewellery for $35.5m, the highest price ever paid for an uncut diamond. [10]