Clarity Scale IF Extra Fine Quality. These gems have microscopic inclusions which are difficult to slightly difficult to see under a loupe with 10X magnification. VVS1 Extra Fine Quality. Small pin-pricks are just visible to the scrutiny of the close nake eye. However, the beauty of the gem is not diminished in anyway VVS2 Very Fine Quality. Small pin-pricks are just visible to the scrutiny of the close nake eye. However, the beauty of the gem is not diminished in anyway VS1 Good Quality. Small pin-pricks and feathers are just visible to the scrutiny of the close nake eye. However, the overall beauty of the gem is still not diminished VS2 Good Quality. These gems have inclusions which are fairly easy to see to the close naked eye. However the overall beauty of the gem is still high. SI1-2 Good to the medium qualities. Included gems with internal features that range from eye visible to easily seen to the naked eye. Opaque/Translucent Highly included,Translucent