K colour diamonds

K is a faint grade on the D to Z colour scale. The first faint grade. A warm tint can start to show in bigger stones.

Grade: 8th of 23, in the faint group
What you see: Colour is still hard to see for an untrained eye.
In RXXO: 1 in 20 diamonds

K in RXXO

142diamonds like this in RXXO right now

Questions

Is K a good colour for a diamond?

K is faint: colour is still hard to see for an untrained eye.

How rare is K colour in RXXO?

About 1 in 20.

What is the difference between K and L colour?

One step on the D to Z scale: K has a touch less colour than L. Side by side, the difference is very hard to see without master stones.

RXXO numbers are the odds every mint draws from. Updated 8 October 2026.