FL - IF(AGS 0)Flawless and Internally Flawless
Flawless: No inclusions
or blemishes of any sort
under 10X magnification.
Internally Flawless: No inclusions, but some
minor blemishes.
VVS1 - VVS2(AGS 1-2)Very Very Slightly Included

Contains minute inclusions that are very difficult to see under 10X magnification, even for an experienced grader.
VS1 - VS2(AGS 3-4)Very Slightly Included

Contains minute inclusions when observed with effort under 10X magnification.
An excellent value as
there is no noticeable
difference to the unaided
eye from VVS.
SI1 - SI2(AGS 5-6)Slightly Included

Contains inclusions noticeable under 10x magnification. An SI1
should not have any eye visible inclusions, but SI2 may, depending on the size and location of the flaws.
I1 - I2 - I3(AGS 7-8-9)Included

Contains inclusions that
are obvious under 10X magnification and possibly
to the unaided eye.
Adiamor does not carry I-grade clarity.