When we say "color" we really mean "absence-of-color" since the best color is no color at all. "Color" is different yet interactive with "fire", which is diamond's unique ability to bend light like a prism producing bright inner flashes of reds, blues, and greens. Fire is one of the reasons diamonds are so eye-appealing.
The highest grade is “D color” all the way down to “Z.” The reason the GIA’s scale originates with D instead of A is to avoid confusion with the many competing color grading scales that were in existence years ago. Body-tones are usually yellow but can also be brown or gray.
The body-tone shown is yellow
E Colorless. Minute traces of body-tone detectable to an experienced gemologist. No perceptible difference in body-tone from D once the diamond is set into jewelry. Rare. Very high grade. Bixler's strongly recommends this color.
F Colorless. Slight trace of body-tone detectable to an experienced gemologist. Barely perceptible difference in body-tone from D once the diamond is set into jewelry. High grade. Bixler's strongly recommends this color.
G Near-colorless. Body-tone is readily detectable to an experienced gemologist. Slightly noticeable difference from colorless diamonds when compared side-by-side in a setting. Still a high grade color that Bixler's recommends.
H Near-colorless. Body-tone readily detectable to a novice when compared side-by-side with colorless diamonds. Significant D difference from colorless diamonds when compared side-by-side in a setting. A higher than average grade color that is still recommended by Bixler's.
I Near-colorless. Body-tone easily detectable to a novice when compared side-by-side with colorless diamonds. Significant difference from colorless diamonds when compared side-by-side in a setting. A respectable color grade especially if used in yellow gold.
J Near-colorless. Body-tone is obvious to a novice when looking for it. Near colorless is its official technical term but it’s not near-colorless in reality. Body-tone is less noticeable if set in yellow gold and may appear one to two color grades higher if medium to strong fluorescence is present. Recommended only in some circumstances.
K→W Faint to Light Color. The body-tone is so obvious that it detracts from the diamond’s beauty. Not recommended unless you require a particular size for your diamond yet have a limited budget.
X, Y & Z If the body tone is yellow then it looks somewhere between lemonade and the sun. In certain cases it can be set it into to jewelry so that it appears as if it’s "Fancy Yellow." This is desirable because its price will be much lower than that of a Fancy Yellow.
Fancy Yellow "Canary" Diamond
Some online education presents color as a personal preference stating that you may prefer the “warmth” of a diamond with a touch of color. Consider such statements as old-wives’-tales or just plain bad advice. Find a diamond expert with a discriminating eye whom you find trustworthy who will show you many diamonds side-by-side in varied lighting environments. Almost no one prefers a lower color diamond when presented in this professional manner. Bixler's will help you chose the highest color within your budget balanced amongst the other characteristics that determine a diamond’s beauty.
You’d be hard pressed to distinguish the difference between, say, an E and an F color diamond once set into a ring. Even a gemologist cannot determine an exact color grade when the diamond is set in a ring so it’s best to consider a range of two colors. But you’ll easily notice color differences when viewing a series of upside-down diamonds set on a white background. Setting them upside-down eliminates the shards-of-rainbow-colors that can “confuse” your color perception.
Bixler's will show you diamonds using this procedure so that you’ll see and understand color just as gemologists do. You’ll even be able to see the difference between two diamonds of the same color since each color grade has a range from low to high.
Gemologists line up a set of pre-graded diamonds, placed upside-down on a white background in color grade sequence. The diamond being graded is "jumped" along the line, like checkers, until its color matches. The room's lighting and environment must be matched to the GIA’s specifications and the pre-graded "comparison diamonds" must be certified by the GIA since ones from lesser gemological labs’ are different.