GemSelect uses the following clarity scale when grading gemstones: |
| IF |
Loupe Clean - Internally flawless; free of inclusions |
| VVS |
Almost Loupe Clean - Very, very slight inclusions; inclusions barely seen under 10x magnification |
| VS |
Eye Clean - Very slight inclusions; inclusions can be seen under 10x magnification |
| SI |
Slightly included - Small inclusions can be seen with the naked eye |
| I1 |
Included - Inclusions can be seen with the naked eye |
| Transparent |
A gemstone having the property of transmitting light without serious diffusion / may have rutile or other inclusions |
| Translucent |
Allowing light to pass through, but not transparent |
| Opaque |
Does not allow light to pass through |