Color
- 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
Diamonds are often slightly yellowish with nitrogen,
and the closer to pure colorless transparency, the rarer and more valuable they are.
The color rating is divided into 23 alphabetical grades, from the highest grade D, to the lowest grade Z.
