I3 clarity

I3 means included: the most marks of any grade.

Grade: 11th of 11, the lowest
In nature: Marks can affect sparkle, clarity and strength.
In RXXO: 1 in 5 diamonds

I3 in RXXO

526diamonds like this in RXXO right now

Questions

What does I3 mean on a diamond?

Included. The most marks of any grade.

How rare is an I3 diamond in RXXO?

About 1 in 5. The most common grade is I3, about 1 in 5.

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