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Diamond color grading chart. Refers to a grading scale for diamonds in the normal color range used by internationally recognized laboratories (GIA, IGI, & GCAL by Sarine for example). The scale ranges from D which is totally colorless to Z which is a pale yellow or brown color.
Diamond certified FL (flawless) by the GIA Two diamonds of grade VS 1 and SI 2 respectively. The GIA diamond grading scale is divided into six categories and eleven grades. [2] The clarity categories and grades are: [3] Flawless category (FL) diamonds have no inclusions or blemishes visible under 10× magnification. [3]
Yellow diamonds of high color saturation or a different color, such as pink or blue, are called fancy colored diamonds and fall under a different grading scale. [34] In 2008, the Wittelsbach Diamond, a 35.56-carat (7.112 g) blue diamond once belonging to the King of Spain, fetched over US$24 million at a Christie's auction. [58]
Type IIa diamonds can have their structural deformations "repaired" via a high-pressure, high-temperature process, removing much or all of the diamond's color. [5] Type IIa diamonds constitute a great percentage of Australian production. Many famous large diamonds, like the Cullinan, Koh-i-Noor, Lesedi La Rona, and The Lulo Rose are Type IIa ...
The diamond was cut into a cushion shaped gem weighing 128.48 carats (25.696 g). For a long time, the Star of the South was considered to be "by far the largest diamond discovered by any woman anywhere", [11] until the Incomparable Diamond was discovered in the 1980s. The diamond has a color grade of Fancy Light Pinkish-Brown.
The Rock is G-color, which is the fourth whitest level of white diamonds. [2] It is the highest grade in the near-colorless color range and only professionals can see a slight tint of color in a G-colored diamond. [3] The diamond is 61.3 grams (2.2 oz) and it has dimensions of 5.4 centimetres (2.1 in) by 3.1 centimetres (1.2 in). [2]
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