The clarity of a diamond is determined by the amount and location of flaws, or blemishes, in the diamond when viewed under 10 power (10x) magnification. GIA rates clarity grades in diamonds from Flawless to Imperfect 3 (see chart below).
Most diamonds contain very tiny birthmarks known as “inclusions.” An inclusion can interfere with the light passing through the diamond. The fewer the inclusions, the more beautiful the diamond will be.
Diamonds have the capability of producing more brilliance than any other gemstone. A diamond that is free of inclusions and surface blemishes is very rare…and therefore very valuable.
| Symbol | Meaning | Definition |
| 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. |
