Practically all diamonds contain naturally occurring internal characteristics called inclusions. The size, nature, location and amount of inclusions determine a diamonds clarity grade and affect its cost.
One unique advantage of the Ideal Cut is that its sparkle can mask otherwise noticeable inclusions.
Flawless, Internally Flawless (FL & IF)
No inclusions visible (by an expert) under 10X magnification.
FL=Flawless IF=Internally Flawless
Very Very Slightly Included (VVS1 & VVS2)
Minute – extremely difficult to find under 10x.
VVS=Very, very slight inclusions
Very Slightly Included (VS1 & VS2)
Minor – difficult to find under 10x.
VS=Very slight inclusions
Slightly Included (SI1, SI2, & SI3)
Noticeable, relatively easy to find under 10x.
Included (I1, I2, I3)
Obvious under 10x – just visible to the naked eye.