These are the highest grades. In this range, the diamonds will appear to have no color in any setting. Diamonds without color are very rare. Therefore, they cost more on the market.
Understand your diamond Qualities
Color refers to the natural tint of a diamond. The closer the diamond is to “colorless” the rarer it is. The industry standard to grading color in a diamond is to assign a letter grade from D (colorless) to J (nearly colorless)
Most diamonds have imperfections in the form of internal flaws and surface blemishes. These imperfections are graded on a scale of FL (flawless) to I1-I3 (included). FL diamonds are the rarest and hardest to find.