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Diamond Color and Grade (1)
2023-04-13 16:22:33
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Each color level represents a certain color density range, the higher the color level, the smaller the density range, and the lower the color level, the relatively larger density range. The lighter the color of the diamond, the closer it is to colorless, and the rarer it is, the more valuable the diamond will be
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According to the depth of color of the cut diamonds, a series of boundaries are artificially divided called color grades. Each color grade represents a certain color concentration range. The higher the color grade, the smaller the concentration range. The lower the concentration, the larger the concentration range. The lighter the color of the diamond, the closer it is to colorless, and the rarer it is, the more valuable the diamond will be.
As the color tone of the diamond deepens, the commercial value gradually decreases. However, when the color of the diamond deepens enough to become striking and vivid, it becomes a very beautiful and extremely rare colored diamond. The color rating of colored diamonds is one This is a complex job that requires special technical equipment, which is no longer within the scope of the "4C" evaluation.
Associated with the "4Cs" grading is the determination of the boundaries between colored and hued diamonds. In the GIA diamond grading standard, there is a standard sample stone representing the boundary between yellow-colored diamonds and yellow-toned diamonds, that is, a master stone with a color grade of Z. The z color master stone can be used as the boundary for determining yellow-color diamonds, but not Suitable for colored diamonds of other colors. There is no corresponding provision in other diamond grading standards.
Diamond color grading (ColourGrading) is the use of colorimetry to grade diamond colors under specified circumstances. Use the determined diamond color cut-off point (master stone) as a reference to judge the color region of the diamond to be graded, and use the color grade of the color range to describe the color characteristics of the diamond to be tested.
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