Clarity
Small imperfections called inclusions appear on some of the diamonds, depending on how big or small the blemish is they receive their clarity grades.
FL-IF=Flawless and Internally Flawless-No inclusions even under a 10x magnification.
VVS1-VVS2 – The inclusion is extremely hard to find under 10x magnification.
VS1-VS2 – Difficult to find the slight inclusions under 10x magnification
SI1-SI2 – Small Inclusions are seen under 10x magnification still not noticeable to the naked eye.
I1-I3 – Imperfections are visible to the naked eye.