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.|