IF – Top quality: Internally Flawless, No Inclusions Visible Even With 10x Magnification.

VVS – Extra fine quality: Very-Very Slightly Included, Minute Inclusions Not Visible To Eye.

VS (1 or 2) – Fine quality: Very Slight Inclusions, Slight Inclusions Visible To Eye.

SI ( 1 or 2) – Good quality: Slight Inclusions, Some Inclusions Visible.

I (1, 2 or 3) – Medium to Low quality:  Included, Many Inclusions Visible.

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