GIA Color Scale
The GIA D-to-Z scale is the industry standard for color grading diamonds.  Each letter represents a range of color based on a diamond’s tone and saturation.   Most of our diamonds are graded between G and I on the color scale. At a J grade and beyond, the human eye can start to detect a yellow tint.

The D grade is considered colorless, rarest and most expensive.  Moving down the scale toward H or I lets you buy a diamond that still appears white, but is more common and more affordable
Diamonds have internal features, called inclusions, and surface irregularities, called blemishes.  Together, they’re called clarity characteristics.  Clarity is the absence of inclusions and blemishes.
The GIA’s clarity grading system is the standard worldwide and is determined based on the size, number, position of, nature and color of the diamond's blemishes

                                                                                                 Ref. GIA.edu