| GIA Color Rankings | Description |
| D, E, F | Colorless |
| G, H, I, J | Near Colorless |
| K, L, M | Faint Yellow |
| N, O, P, Q, R | Very Light Yellow |
| S, T, U, V, W, X, Y, Z | Light Yellow |
| FL | Flawless. Shows no inclusions or blemishes of any sort under 10X magnification when examined by an experienced grader. Extremely rare. |
| IF | Internally Flawless. Has no inclusions when examined by an experienced grader using 10X magnification. Very rare. |
| VVS1, VVS2 | Very, Very Slightly Included. Contains minute inclusions that are difficult even for experienced graders to see under 10X magnification. |
| VS1, VS2 | Very Slightly Included. Contains minor inclusions ranging from difficult to somewhat easy to see for an experienced grader when examined under 10X magnification. |
| SI1, SI2 | Slightly Included. Contains inclusions that are easy to very easy to see for an experienced grader under 10X magnification. Some inclusions may be visible to the unaided eye. |
| I1 | Included. Contains obvious inclusions visible to an experienced grader under 10X magnification; can be visible without magnification. |
| I2, I3 | Included. Contains obvious inclusions. Visible without magnification, and may affect durability. |