As you’re shopping for diamonds, the GIA Color Scale will come in handy if you’re trying to understand the subtle color differences of D-to-Z color diamonds. Watch this video to see how GIA addresses these differences when assigning a color grade to a diamond. | 4Cs of Diamond Quality by GIA

How do experts assess a diamond’s color? Although many diamonds appear colorless, GIA gemologists can detect even the slightest presence of yellow or other hues. GIA established the color grading standard, called the GIA Color Scale, to indicate the absence or presence of color. The scale begins with the letter D, representing colorlessness, and continues with the increasing presence of color to the letter Z. Diamond graders use color-comparison diamonds, called masterstones, to determine a diam

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Diamond clarity refers to the absence of inclusions and blemishes. While no diamond is perfectly pure, the closer it comes, the higher its value. Evaluating diamond clarity involves determining the number, size, relief, nature and position of these characteristics, as well as how they affect the overall appearance of the stone. Learn more about diamond clarity by watching this one-minute video! | 4Cs of Diamond Quality by GIA

DIAMOND COLORThe color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value. GIA's D-to-Z color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to masterstones of established color value.GIA's D-to-Z color-grading scale is the industry's most widely accepted grading system.