GIA Color Wheel

GIA's diamond D-to-Z color-grading scale is the industry's most widely accepted grading system. The scale begins with the letter D, representing colorless, and continues, with increasing presence of color, to the letter Z.

d color z color y color x color w color v color u color t color s color r color q color p color o color n color m color l color k color j color i color h color g color f color e color

Colorless

Near Colorless

Faint

Very Light

Light

Diamond Color Actually Means Lack of Color

The diamond 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 diamond color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to masterstones stones of established color value.

Many of these color distinctions are so subtle that they are invisible to the untrained eye; however, these distinctions make a very big difference in diamond quality and price.

Carat Weight

Diamond carat weight is the measurement of how much a diamond weighs. A metric "carat" is defined as...

Cut

Natural diamonds are the result of carbon exposed to tremendous heat and pressure deep in the earth. This...

Clarity

Natural diamonds are the result of carbon exposed to tremendous heat and pressure deep in the earth. This...