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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 ...
Each grid has the clarity options on the horizontal line and the color options on the vertical line. In order to calculate the price of a diamond according to the Rapaport Price List, you need to know the size, color and clarity of the diamond. The price listed based on this information is in hundreds of dollars per carat. [3]
While imports make up relatively small volume, or carats, they drastically increase the value of rough diamond exports. Subtracting the values and volume of imported diamonds shown on South Africa's K.P. certificates from corresponding exports, the actual price per carat of rough diamonds being exported for the first time falls dramatically."
There are considerable price shifts near the edges of the size bands, so a 0.49 carats (98 mg) stone may list at $5,500 per carat = $2,695, while a 0.50 carats (100 mg) stone of similar quality lists at $7,500 per carat = $3,750. Stones near the top of a size band (or rarer fancy coloured varieties) tend to be uprated slightly.
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.
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.
The diamond was first given a generic name after the mine (Karowe) and the pipe (AK6) where it was found. [13] On 18 January 2016, Chief Executive Officer William Lamb of Lucara Diamond announced a competition, open to all Botswana citizens, to name the stone. In addition to naming the diamond the winner would receive P25,000 (about $2,170). [14]
The Blue Moon of Josephine is a 12.03 carats (2.406 g) blue diamond, described as flawless by experts, that was discovered in South Africa in January 2014 and was sold at a Sotheby's auction in Geneva in November 2015 at a record-setting price of $48.4 million (43.2 million Swiss francs plus fees). [1]