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  2. 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.

  3. Diamond cutting - Wikipedia

    en.wikipedia.org/wiki/Diamond_cutting

    The 253-carat Oppenheimer Diamond—an uncut diamond does not show its prized optical properties. In colored diamonds, cutting can influence the color grade of the diamond, thereby raising its value. Certain cut shapes are used to intensify the color of the diamond. The radiant cut is an example of this type of cut.

  4. Diamond segment - Wikipedia

    en.wikipedia.org/wiki/Diamond_segment

    Diamond segment are the functional parts of a metal-bonded diamond tool. The metal-bonded diamond tool can be a metal-bonded diamond blade, a diamond grinding cup wheel, a diamond core drill bit, a diamond gang saw blade, etc. The diamonds of a metal-bonded diamond tool are all in the tool's diamond segments to play their role of cutting or ...

  5. Diamond (gemstone) - Wikipedia

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

    Diamond cutting is the art and science of creating a gem-quality diamond out of mined rough. The cut of a diamond describes the manner in which a diamond has been shaped and polished from its beginning form as a rough stone to its final gem proportions. The cut of a diamond describes the quality of workmanship and the angles to which a diamond ...

  6. Lesedi La Rona - Wikipedia

    en.wikipedia.org/wiki/Lesedi_La_Rona

    British jeweller Graff bought the rough diamond for $53 million in 2017. By April 2019, Graff had cut it into one large emerald cut diamond, the Graff Lesedi La Rona , weighing 60.5 grams; 2.1 ounces; 1.9 troy ounces (302.37 carats) and 66 smaller stones.

  7. Diamonds as an investment - Wikipedia

    en.wikipedia.org/wiki/Diamonds_as_an_investment

    Diamonds of smaller sizes are traded in parcels of similar stones, called 'melee,' after the French word for mix. Generally diamonds of exactly similar size, cut, shape, color and clarity are used in a single piece of diamond jewelry. If not, the stones would not match and the piece would not sell.

  8. Uncut diamond - Wikipedia

    en.wikipedia.org/?title=Uncut_diamond&redirect=no

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  9. Florentine Diamond - Wikipedia

    en.wikipedia.org/wiki/Florentine_Diamond

    The Florentine Diamond is a lost diamond of Indian origin. It is light yellow in colour with very slight green overtones. It is light yellow in colour with very slight green overtones. It is cut in the form of an irregular (although very intricate) nine-sided 126-facet double rose cut, with a weight of 137.27 carats (27.454 g).

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