| F |
Flawless |
Free from all inclusions or blemishes |
| IF |
Internally Flawless |
No inclusions visible at 10x magnification. |
| VVS1 |
Very Very Slightly Included #1 |
Inclusions that are extremely difficult to locate at 10x. |
| VVS2 |
Very Very Slightly Included #2 |
Inclusions that are very difficult to locate at 10x. |
| VS1 |
Very Slightly Included #1 |
Minor inclusions that are difficult to locate at 10x. |
| VS2 |
Very Slightly Included #2 |
Minor inclusions that are somewhat difficult to locate at 10x. |
| SI1 |
Slightly Included #1 |
Noticeable inclusions that are easy to locate at 10x. |
| SI2 |
Slightly Included #2 |
Noticeable inclusion that are very easy to locate at 10x. |
| I1 |
Included #1 |
Obvious inclusions. Somewhat easy to locate with the unaided eye. |
| I2 |
Included #2 |
Obvious inclusions. Easy to locate with the unaided eye. |
| I3 |
Included #3 |
Obvious inclusions. Very easy to locate with the unaided eye. |