The 4 C'sDiamond ShapesDiamond DirectoryGem Laboratory
The 4 Cs

Clarity scale continued...

F: Flawless: A rare breed - belongs in Smithsonian.
IF: Internally Flawless: Belongs in exhibit.
VVS1: Very, very slightly included: It would take a superhero to see the inclusion.
VVS2: Very, very slightly included 2: A second tier superhero, like the Green Hornet, could spot a tiny, tiny inclusion.
VS1: Very slightly included 1: Mere mortals with the help of microscope that magnifies 10x would have a tough time seeing this inclusion.
VS2: Very slightly included 2: That same mortal, using the same microscope has a chance of seeing this inclusion.
SI1: Slightly included 1: A regular Joe can find this inclusion under a microscope when magnified 10x.
SI2: Slightly included 2: Strap on a microscope and you could spot this inclusion.
I1: Included 1: Take away the microscope and with 20/20 vision you can sometimes see an identifying characteristic. This is the most popular clarity on the scale.
I2: Included 2: Take off the sunglasses and you'll always see this inclusion.
I3: Included 3: Your Aunt Gert could spot this inclusion from across the room.