SI2 clarity
SI2 means slightly included: marks are easier to notice than in an SI1.
- Grade
- 8th of 11, between SI1 and I1
- In nature
- Common in jewellery: most shop diamonds are VS or SI.
- In RXXO
- 1 in 8 diamonds
SI2 in RXXO
385diamonds like this in RXXO right now
Questions
What does SI2 mean on a diamond?
Slightly included. Marks are easier to notice than in an SI1.
How rare is an SI2 diamond in RXXO?
About 1 in 8. The most common grade is I3, about 1 in 5.
Is SI2 better than I1?
Yes, by one grade. SI2 sits just above I1 on the 11-step clarity scale. In RXXO, an SI2 is about 1 in 8, an I1 about 1 in 7.
RXXO numbers are the odds every mint draws from. Updated 8 October 2026.