Ask us for more info about D to F color grade diamonds. Of all gem quality diamonds, less than 1% qualify for the D to F grades. Only a trained gemologist, using the GIA color scale, will be able to identify color and if the diamond is a perfect D or a nearly perfect E or F grade. But there is more detail to the GIA D through Z diamond color scale.Īll diamonds in this color range have virtually no color. The D scale white diamond is best and a Z scale white diamond is very yellow and something you will want to avoid. This, of course, makes sense because that is how diamonds are viewed. This process ends with the top of the diamond facing up. In the grading process, the entire body of the diamonds is examined. Thus, several gemologists may examine a diamond to validate the collective grading. Even with a standardized set of diamonds, or GIA cubic zircon for comparison, this is a subjective process. Color grading takes into consideration the overall color of the body of the diamond. A diamond is color graded based which standard it matches. A gemologist will use GIA certified diamonds or a set of cubic zirconia also certified by the GIA for comparison. White diamonds are graded by placing them with the table or top of the stone down against a white background. Gemologists use standardized stones for comparison. Recognizing the difference between the virtually colorless D diamond grade and an only slightly colored E diamond grade is difficult, if not impossible, for the non-professional. But, the GIA grading scale has 23 steps from D through Z. And these diamonds can be easily differentiated from colorless white diamonds. It is easy to see when a diamond has a lot of yellow or brown tint. Thus, less color is always better in white diamonds. You may not notice the color in a nice diamond ring but the faint color may reduce the sparkle and brilliance of the gem. It is best to purchase a certified diamond to get true value for your dollar. Blue diamonds, on the other hand, can grade from faint to fancy dark, deep, or vivid. Yellow diamonds can be graded fancy light, fancy, fancy intense, and fancy vivid. And generally, more color is better in these gems. This system takes into account the fact that the saturation of color may vary among fancy diamonds. The GIA has a more flexible grading system for fancy diamonds. Today, white diamonds are graded on a GIA D through Z scale with D having the least color. Before color grading was standardized, gemologists used terms like Wesselton, river, jager, light yellow, very light yellow, cape, or other numbering regimes. The worldwide standard for grading diamonds by color is that of the GIA, the Gemological Institute of America.
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