The grading starts at F which is a completely flawless and extremely
rare diamond. The GIA clarity scale chart below shows the different
grades of diamond clarity. For grades F to SI, a diamond's clarity
grade has an impact on the diamond's value, not on the unmagnified
diamond's appearance.
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IF |
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Internally flawless |
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No internal flaws, but some surface flaws. Very rare. |
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VVS1- VVS2 |
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Very Very
Slightly Included |
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Minute inclusions very difficult to detect under 10x magnification by a trained gemmologist. VVS1 is slightly cleaner than VVS2. |
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VS1-VS2 |
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Very Slightly
Included |
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Minor inclusions only visible under 10x magnification. VS1 is slightly cleaner than VS2. |
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SI1-SI2 |
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Slightly Included |
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Inclusions easy to see under 10x
magnification but usually not visible with the naked eye.
SI1 is slightly cleaner than SI2. |
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I1-I2-I3 |
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Included |
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Inclusions visible with the naked eye. |
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