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Clarity

A diamond's clarity is measured by the existence, or absence, of visible flaws. Tiny surface blemishes or internal inclusions -- even those seen only under magnification with a jeweler's loupe -- can alter the brilliance of the diamond and, thus, effect its value.

Clarity levels begin with Flawless (F & IF) and move down to Very Very Slight (VVS1 & 2), Very Slight (VS1 & 2), Slightly Included (SI1 & 2), and Included (I1, 2 & 3).

 

FL, IF Diamonds Flawless: No internal or external flaws Internally Flawless: No internal flaws
VVS1, VVS2 Diamonds Very, Very Slightly Included: Very difficult to see inclusions under 10% magnification.
VS1, VS2 Diamonds Very Slightly included: Inclusions are not typically visible to the unaided eye,
SI1, SI2 Diamonds Slightly included: Inclusions are visible under 10× magnification and may be visible to the unaided eye.
I1, I2, I3 Diamonds Included: Inclusions are visible with the unaided eye.

Diamond clarity