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Weight Cut Color Purity Proportions

Purity

International gemological schools (GIA - CCIP - HRD) grade diamond purity under 10 X magnification as follows.

Purity grades:

FL (flawless)
IF (internally flawless)
These diamonds are completely pure under 10 X magnification.
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VVS1 (very very small inclusion #1)
VVS2 (very very small inclusion #2)
These have minute inclusions very hard to see under 10 X magnification. _________________________________________________________
VS1 (very small inclusion #1)
VS2 (vey small inclusion #2)
These have very small inclusions hard to see under 10 X magnification. _________________________________________________________
SI1 (small inclusion #1)
SI2 (small inclusion #2)
Small inclusions are easily visible with 10 X magnifier, but invisible to the naked eye. They are seen by side of the crown. _________________________________________________________

Piqué 1 (inclusion #1)
Inclusion(s) are very easily visible under10 X magnification, but hard to see with the naked eye from side of crown. They do not affect sparkling. _________________________________________________________
Piqué 2 (inclusion #2)
Big and/or numerous inclusion(s) are easily visible to the naked eye from side of crown. They slightly affect sparkling. _________________________________________________________
Piqué 3 (inclusion #3)
Big and/or numerous inclusion(s) are easily visible to the naked eye from side of crown. They affect sparkling.
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Jérôme JABÈS, GIA Gemologist