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The weight of a diamond is one of these variables that determines a diamond’s worth and is what the general public is most familiar with. The unit of measurement, called the carat, equals 200 ...
The non-linear pricing of different sizes (weights) of diamonds means that it is not realistic to exchange, for example, two quarter-carats (50 mg) for one half-carat (100 mg). With commodities such as gold, it is clear that one 20-gram bar is worth the same as two 10-gram bars, assuming the same purity.
The Paragon diamond was acquired by Graff in 1989. The Paragon is a 7-sided diamond of 137.82 carats (27.564 g), cut, [13] [14] and was worn as part of "millennium" necklace of round, pink, blue and yellow diamonds by Naomi Campbell in 1999. [15] The Lesotho Promise was acquired as a rough 603-carat (120.6 g) stone for $12.4 million in 2006. [16]
The carat weight measures the mass of a diamond. One carat is defined as 200 milligrams (about 0.007 ounces avoirdupois). The point unit—equal to one one-hundredth of a carat (0.01 carat, or 2 mg)—is commonly used for diamonds of less than one carat. All else being equal, the price per carat increases with carat weight, since larger ...
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).
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.