The color of a diamond is graded on a scale from D (colorless) to Z (light yellow or brown). Truly colorless diamonds are incredibly rare and, as a result, highly valuable. However, most diamonds have slight color variations that may be subtle to the untrained eye.
The less color a diamond has, the higher its grade and value. For those seeking an icy, clear stone, diamonds in the D-F range are ideal. For a warm glow at a more accessible price point, diamonds graded G-J can also be beautiful options.