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2. 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.

3. Diamond (gemstone) - Wikipedia

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

   Typically a round brilliant 1.0-carat (200 mg) diamond should have a diameter of about 6.5 mm (0.26 in). Mathematically, the diameter in millimeters of a round brilliant should approximately equal to 6.5 times the cube root of carat weight, or 11.1 times the cube root of gram weight, or 1.4 times the cube root of point weight.

4. Cullinan Diamond - Wikipedia

   en.wikipedia.org/wiki/Cullinan_Diamond

   Newspapers called it the "Cullinan Diamond", a reference to Sir Thomas Cullinan, who opened the mine in 1902. [5] It was three times the size of the Excelsior Diamond, found in 1893 at Jagersfontein Mine, weighing 972 carats (194.4 g). Four of its eight surfaces were smooth, indicating that it once had been part of a much larger stone broken up ...

5. Lesedi La Rona - Wikipedia

   en.wikipedia.org/wiki/Lesedi_La_Rona

   According to Graff, the stone is the "largest highest clarity, highest color diamond ever graded by the Gemological Institute of America (GIA)". The other 66 stones cut from the original Lesedi La Rona range in size from 26 carats (5.2 g; 0.18 oz) to below one carat (0.20 g; 0.0071 oz).

6. 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.

7. List of diamonds - Wikipedia

   en.wikipedia.org/wiki/List_of_diamonds

   A 5.05-carat (1.010 g) Emerald-cut red diamond formerly known simply as "Red Diamond". This is the second-largest known red diamond. It was cut from a 35-carat (7.0 g) piece of boart discovered near Lichtenburg, South Africa. It reappeared in 2007 after a 37-year absence from sight, and was purchased by Kazanjian Brothers Inc. —