Nearly all diamonds bear naturally identifying characteristics known as "inclusions". Preferred Jewelers also uses the GIA scale when selecting diamonds to sell. The resulting nomenclature provides a method by which diamonds are rated on the extent of the inclusions each bears.
Preferred Jewelers also uses the GIA scale
The following chart is a simple and easy overview of the clarity grading universally used in the diamond industry.
| Shape |
Definition |
Description |
| F |
Flawless or Internally Flawless |
No inclusions visible, even under 10X magnification. |
| VVS-1 |
Very, Very Slightly Included |
Almost no imperfections visible under 10X magnification. |
| VVS-2 |
Very, Very Slightly Included |
Very few and very slight inclusions visible under 10X magnification. |
| VS-1 |
Very Slightly Included |
Few and slight inclusions visible under 10X magnification. |
| VS-2 |
Very Slightly Included |
Slightly more inclusions visible than VS-1 under 10X magnification. |
| SI-1 |
Slightly Included |
Inclusions visible under 10X magnification. |
| SI-2 |
Slightly Included |
Inclusions readily visible. |
| I-1 |
Included |
Inclusions very readily visible under 10X magnification and may be apparent to the naked eye. |
| I-2 |
Included |
Inclusions visible to the naked eye. |
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