Diamond color is one of the 4C’s and is a major factor in determining the quality and cost of a diamond. Diamond color actually refers to the lack of color not the amount of color found in the diamond. Diamonds composed of pure carbon are colorless and are extremely rare and costly. Most diamonds contain nitrogen, boron, or hydrogen all of which impact color. A majority of all diamonds sold on the market today contain traces of nitrogen that causes slight shades of yellow or brown.
In the 1950’s the Gemological Institute of America (GIA) instituted a color grading system to eliminate the confusion regarding diamond color that is still used industry wide today. Diamonds are graded on a scale from D (colorless) to Z (light yellow or brown).
Diamond Color Grade Chart
D-E-F = colorless
G-H-I = near colorless
J-K-L-M = faint yellow
N-Z = very light to light yellow
Some key factors to consider when choosing a diamond color
Price – colorless diamonds are more rare and therefore costly. A near colorless diamond provides a great value and looks beautiful with any metal type.
Cut – when a diamond is cut well the diamond’s color may appear whiter than it actually is disguising any color within the stone.
Size – the size of a diamond will affect the appearance of its color. Color can be seen more easily in a larger diamond than a smaller one. If choosing a diamond weight of 1.00ct or greater look for a diamond in the colorless (D-F) or near colorless (G-I) range. If you prefer the warmth of a diamond with color choose a faint yellow (J-M) stone. When choosing a diamond beyond the I color range you’ll want to consider your metal choice for the setting. Some like the contrast between a white metal such as platinum, palladium, or white gold and the faint yellow tones of the diamond and some don’t want to see any color at all. This is a personal preference and there is no right or wrong diamond color for any setting choice.
Shape – the shape of a diamond will affect color especially in a step-cut diamond such as an Asscher or Emerald. With their large open facets they do not display the same amount of brilliance as other cuts and color can be easily seen through the table.