COLOR While most diamonds appear to be white, virtually all have slight traces of color. Evaluating a diamond's color for grading purposes is done by measuring the degree to which a diamond approaches colorlessness. Gemologists and jewelers describe the color of diamonds on a letter scale beginning with D (colorless) and moving through the alphabet to Z. The degree of colorlessness is not easily visible to the naked eye. D, E, and F color grades are more expensive because they are more rare. However, well cut diamonds with good clarity of all color grades can be equally dazzling as it is the interplay of the 4C's which determines each individual stone's unique beauty.
CLARITY Practically all diamonds contain naturally occurring internal blemishes called inclusions, or a diamond's natural birthmarks (these can look like tiny crystals, feathers, or clouds). However, many are microscopic in nature and can only be glimpsed under powerful magnification through a standard 10-power jeweler's loupe. Diamonds with the fewest inclusions are graded as VVS1 or VVS2; those on the other end of the scale are graded I1 or I3. The fewer inclusions the rarer the stone.