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  2. Diamonds as an investment - Wikipedia

    en.wikipedia.org/wiki/Diamonds_as_an_investment

    In contrast to precious metals, there is no universal world price per gram for diamonds. The industry refers to price guides. Rough diamond prices have historically been impacted by the mining companies controlling supply, most notably De Beers. However, after the dismantling of the De Beers cartel in 2001, the industry is now more fragmented ...

  3. Are lab-grown diamonds 'worthless'? Experts weigh in as ... - AOL

    www.aol.com/news/lab-grown-diamonds-worthless...

    Some high-end fine jewelers have gotten on board with the trend. In 2023, jeweler Jean Dousset, the great-great-grandson of Louis Cartier, opened a showroom with “designer” lab-grown diamonds ...

  4. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    Another important diamond center is New York City, where almost 80% of the world's diamonds are sold, including auction sales. [93] The De Beers company, as the world's largest diamond mining company, holds a dominant position in the industry, and has done so since soon after its founding in 1888 by the British businessman Cecil Rhodes.

  5. 813-karat diamond was just sold as the most expensive diamond ...

    www.aol.com/news/2016-05-09-813-karat-diamond...

    The 813-karat diamond was mined from Canadian mining firm Lucara in a Botswana mine during late November of last year. 813-karat diamond was just sold as the most expensive diamond in the world ...

  6. Diamond (gemstone) - Wikipedia

    en.wikipedia.org/wiki/Diamond_(gemstone)

    The GIA study concluded that "the diamond industry would be better served by considering each individual diamond on its own visual merits." Today, fluorescent natural diamonds are again becoming very desirable with major diamond miners such as the world's largest diamond producer, Alrosa, reminding the industry of the historic desirability and ...

  7. De Beers is sitting on a $2 billion pile of diamonds as ... - AOL

    www.aol.com/finance/beers-sitting-2-billion-pile...

    Waning demand for natural diamonds has helped lift De Beers's inventory to $2 billion, the most since the 2008 financial crash, according to the Financial Times. In fact, the value of the diamond ...

  8. Material properties of diamond - Wikipedia

    en.wikipedia.org/wiki/Material_properties_of_diamond

    Type II diamonds have very few if any nitrogen impurities. Pure (type IIa) diamond can be colored pink, red, or, brown owing to structural anomalies arising through plastic deformation during crystal growth; [20] these diamonds are rare (1.8% of gem diamonds), but constitute a large percentage of Australian diamonds. Type IIb diamonds, which ...

  9. Gemological Institute of America - Wikipedia

    en.wikipedia.org/wiki/Gemological_Institute_of...

    Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.