Clarity Grading:
AusGems: Uses the following clarity scale when grading gemstones:

IF: =       Loupe Clean - Internally flawless; free of inclusions. 

VVS: =   Almost Loupe Clean - 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.