Many experts name color as the number one consideration in choosing a diamond. A diamond’s color is graded on an alphabetical scale from D-Z, with D being absolutely colorless and Z being light yellow. Beyond “Z”, a diamond is considered to be an exotic or “Fancy” color (diamonds occur in every color of the rainbow).
DIAMOND COLOR SCALE
Since color differences can be so subtle, they are impossible to determine by the untrained eye. To grade a diamond, gemologists often place it on a white background next to another diamond that has been previously graded. If all other factors are equal, the less color in a diamond or the higher the color rating, the more valuable a diamond becomes. Likewise, as the amount of color increases, the price of a diamond decreases (though this does not necessarily reduce the beauty of a diamond).