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

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.