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2. Diamond cut - Wikipedia

   en.wikipedia.org/wiki/Diamond_cut

   HCA: defining ideal cut diamonds is a detailed explanation of the "Holloway Cut Adviser". A web service that uses this software is available. Malecka, Anna (2017). Naming of the Koh-i-Noor and the Origin of Mughal-Cut Diamonds, The Journal of Gemmology, no. 4. 38(8). OctoNus Software has posted several diamond cut studies, by various authors ...

3. The symbolism and meaning behind different engagement ring shapes

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

   Oval Cut: Unique and Classic. Oval diamond engagement rings offer a distinctive twist to a classic Round. They're ideal for distinguished, creative people who elegantly stand out from the crowd.

4. Diamond cutting - Wikipedia

   en.wikipedia.org/wiki/Diamond_cutting

   An example of this is the marquise cut diamond which was popular in the 1970s to 1980s. In later decades, jewelers had little success in selling this shape in comparison to other shapes like the oval or pear shape. [citation needed] The marquise can be cut into an oval diamond by any diamond cutter with a loss of 5 to 10% in total weight.

5. Brilliant (diamond cut) - Wikipedia

   en.wikipedia.org/wiki/Brilliant_(diamond_cut)

   The 2005 AGS standards penalize stones with "cheated" girdles. They grade from 0 to 10. The GIA began grading cut on every grading report beginning in 2006, based on their comprehensive study of 20,000 proportions with 70,000 observations of 2,000 diamonds. [4] The single descriptive words are as follows: Excellent, Very Good, Good, Fair, and Poor.

6. Lazare Kaplan International - Wikipedia

   en.wikipedia.org/wiki/Lazare_Kaplan_International

   In 1919, Lazare Kaplan's cousin, mathematician Marcel Tolkowsky, first published the mathematical formula for diamonds cut to "ideal" proportions, a formula designed to optimise the brilliance, fire and sparkle in a polished diamond. In the same year, LKI became the first commercial-scale operation to cut its diamonds to ideal proportions.

7. Diamond (gemstone) - Wikipedia

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

   The quality of a diamond's cut is widely considered the most important of the four Cs in determining the beauty of a diamond; indeed, it is commonly acknowledged that a well-cut diamond can appear to be of greater carat weight, and have clarity and color appear to be of better grade than they actually are.