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  2. De Beers - Wikipedia

    en.wikipedia.org/wiki/De_Beers

    It also purchased and stockpiled diamonds produced by other manufacturers as well as surplus diamonds in order to control prices by limiting supply. [45] Finally, it bought diamonds when prices fell considerably naturally, to constrict supply and drive their value back up, such as during the Great Depression.

  3. Golden Jubilee Diamond - Wikipedia

    en.wikipedia.org/wiki/Golden_Jubilee_Diamond

    The Golden Jubilee Diamond, a 545.67 carat (109.13 g) brown diamond, is the largest cut and faceted diamond in the world. It outweighs the Cullinan I by 15.37 carats (3.07 g). The Golden Jubilee Diamond was discovered in 1985 at the Premier Mine , which is also the origin of the Cullinan diamond (1905) and other notables such as the Taylor ...

  4. Koh-i-Noor - Wikipedia

    en.wikipedia.org/wiki/Koh-i-Noor

    One day, Ranjit Singh asked the diamond's former owners – Shuja and his wife Wafa Begum – to estimate its value. Wafa Begum replied that if a strong man threw a stone in four cardinal directions and vertically, Koh-i-Noor would be worth more than the gold and precious stones filled in the space.

  5. List of synthetic diamond manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_synthetic_diamond...

    Apollo Diamond (defunct, assets sold in 2011 to Scio Diamond) [1] ALTR Created Diamonds [2] De Beers (Lightbox) [3] Diamond Foundry [4] Gemesis (now a non-producing reseller called Pure Grown Diamonds) [5] Scio Diamond Technology Corporation [6] (colorless) Tairus [7] WD Lab Grown Diamonds [8]

  6. List of largest rough diamonds - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_rough_diamonds

    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.

  7. 'Antiques Roadshow': diamond and ruby jewelry worth a fortune

    www.aol.com/news/2014-08-12-antiques-roadshow...

    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 ...

  8. Signet Jewelers - Wikipedia

    en.wikipedia.org/wiki/Signet_Jewelers

    Signet Jewelers Ltd. (Ratner Group 1949–1993 then Signet Group plc to September 2008) is, as of 2015, the world's largest retailer of diamond jewellery. [1] The company is domiciled in Bermuda and headquartered in Akron, Ohio, and is listed on the New York Stock Exchange. The group operates in the middle market jewellery segment and has ...

  9. Alrosa - Wikipedia

    en.wikipedia.org/wiki/ALROSA

    The gem is reported to be of jewelry quality, measuring 22.47 x 15.69 x 10.9 millimetres, with a saturated pink tone and practically no defects, according to Alrosa. [50] The pink diamond was mined by subsidiary Almazy Anabara, which operates the Severalmaz kimberlite pipes and placer deposits near riverways in the northwest part of Yakutia. [51]

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