Diamond Grading Series_ COLOR

The quality of a diamond's color is one of the "Four Cs" of diamond grading, which are color, cut, clarity, and carat weight. The color of a diamond is graded on a scale from D (colorless) to Z (yellow or brown), with D being the most valuable and Z being the least valuable.
Colorless diamonds (D, E, and F grades) are the most valuable and desirable because they allow more light to pass through them and reflect off their facets, creating a beautiful, sparkling appearance. Near-colorless diamonds (grades G, H, I, and J) are also popular and have a slight yellow or brown tint that is often difficult to see with the naked eye.
Diamonds with grades K, L, and M have a more noticeable yellow or brown tint and are considered lower quality. Diamonds graded N through Z have a more pronounced yellow or brown color, which reduces their value and desirability.
It's important to note that some diamonds, known as "fancy colored diamonds," have colors that fall outside of the D-to-Z scale. These diamonds can be yellow, brown, pink, blue, green, or even red, and their value is determined by the intensity and rarity of their color.
Diamond Color Explained - GIA's Grading Scale (With Examples ...

Image provided by Gemology Institute of America