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  2. Diamond cutting - Wikipedia

    en.wikipedia.org/wiki/Diamond_cutting

    The weight retention analysis studies the diamond rough to find the best combination of finished stones as it relates to per carat value. For instance, a 2.20-carat (440 mg) octahedron may produce (i) either two half-carat (100 mg) diamonds whose combined value may be higher than that of (ii) a 0.80-carat (160 mg) diamond plus a 0.30-carat (60 ...

  3. A Brief History of the Cullinan Diamonds, Queen Elizabeth's ...

    www.aol.com/brief-history-cullinan-diamonds...

    Along with accepting Cullinan I and II on behalf of the Crown, King Edward VII purchased Cullinan VI, an 11.5-carat marquise-cut diamond, for his consort Queen Alexandra, who had the stone set ...

  4. Diamond cut - Wikipedia

    en.wikipedia.org/wiki/Diamond_cut

    A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut refers to shape (pear, oval), and also the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance—a poorly-cut diamond is less luminous.

  5. Diamond (gemstone) - Wikipedia

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

    Since the per carat price of diamond shifts around key milestones (such as 1.00 carat (200 mg)), many one-carat diamonds are the result of compromising cut for carat. Some jewelry experts advise consumers to buy a 0.99-carat (198 mg) diamond for its better price or buy a 1.10-carat (220 mg) diamond for its better cut, avoiding a 1.00-carat (200 ...

  6. The symbolism and meaning behind different engagement ring shapes

    www.aol.com/symbolism-meaning-behind-different...

    Diamonds with an elongated shape, like the Oval and Marquise, often appear larger than Round cut diamonds of the same carat weight. How the shape carries its carat weight and interacts with light ...

  7. 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. In April 1905, it was put on sale in London, but despite considerable interest, it was still ...

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