Colorless diamonds are listed in the Colorless range. If a diamond falls into one of this color grading, they are the considered to be the most rare and valuable. ‘D’ and ‘E’ colored diamonds will display no color whereas ‘F’ color diamonds will display the slightest hint of color (yellow or grey) when graded face up.
The color is defined by the amount of color that a diamond will display to a viewer. In terms of a diamond’s value, the absence of color is often the most treasured. When a diamond is pure chemically, it will have an absence of color comparable to a drop of water. A colorless diamond will have a much high value than a diamond with color.
The Gemological Institute of America (or GIA) grades color on a scale of ‘D’ (the absence of color or the whitest diamond) to ‘Z’ (a yellow or brown color). As you compare two diamonds, the most noticeable color difference is typically visible when the diamonds are two grades apart (for instance comparing D to F).
To avoid a pale yellow color, choose a diamond grade H or higher.