How to Sell DiamondGrading. The color of a diamond has the second biggest impact on its price, after carat weight. Grading color in the normal range involves deciding how closely a stone's bodycolor approaches colorlessness.
Most diamonds have at least a trace of yellow or brown bodycolor.
With the exception of some natural fancycolors, such as blue, pink, purple, or red, the colorless grade is the most valuable. A fancy yellow diamond fetches a higher price than a light yellow diamond. The effect of all the different properties of Diamond on Cost is discussed in more detail in the Cost section. For color, let's take a typical Diamond for an example, and see what happens when we take it through different color grades. Let's start with a 1.00 carat Diamond of K color and VS1 Clarity.