According to GIA standards, diamond clarity levels are divided into: Flawless Fl, Inner Flawless IF, Very Flawless VVS, Micro Flawless VS, Small Flawless SI, and Flawless I.
FL:
IF :
VVS1-VVS2 :
VS1-VS2 :
SI1-SI2 :
P1/I1-P3/I3 :