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  2. Diamond (gemstone) - Wikipedia

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

    Neither of these changes makes the diamond appear any larger, and both greatly reduce the sparkle of the diamond. (A poorly cut 1.0-carat (200 mg) diamond may have the same diameter and appear as large as a 0.85-carat (170 mg) diamond.) The depth percentage is the overall quickest indication of the quality of the cut of a round brilliant ...

  3. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    In May 2009, a 7.03-carat (1.406 g) blue diamond fetched the highest price per carat ever paid for a diamond when it was sold at auction for 10.5 million Swiss francs (6.97 million euros, or US$9.5 million at the time). [59]

  4. Diamond cutting - Wikipedia

    en.wikipedia.org/wiki/Diamond_cutting

    Sometimes the cutters compromise and accept lesser proportions and symmetry in order to avoid inclusions or to preserve the weight. Since the per-carat price of a diamond shifts around key milestones (such as 1.00 carat), many one-carat (200 mg) diamonds are the result of compromising cut quality for carat weight.

  5. Diamonds as an investment - Wikipedia

    en.wikipedia.org/wiki/Diamonds_as_an_investment

    Stones near the top of a size band (or rarer fancy coloured varieties) tend to be uprated slightly. Some of the price jumps are related to marketing and consumer expectations. For example, a buyer expecting a 1 carat (200 mg) diamond solitaire engagement ring may be unwilling to accept a 0.99 carats (198 mg) diamond. [citation needed]

  6. Koh-i-Noor: The History of the World's Most Infamous Diamond

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

    Koh-i-Noor: The History of the World's Most Infamous Diamond is a 2017 book on the Koh-i-Noor diamond written by William Dalrymple and Anita Anand. [1] The gem is one of the largest cut diamonds in the world, weighing 105.6 carats (21.12 g), and part of the British Crown Jewels. Koh-i-Noor is Persian for "Mountain of Light"; it has been known ...

  7. Carat (mass) - Wikipedia

    en.wikipedia.org/wiki/Carat_(mass)

    The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1] [2] and soon afterwards in many countries around the world.

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