The GIA grades diamond clarity in the range FL (Flawless) to I (Included), with FL being the top clarity grade and I being the least. In the diamond clarity chart, VVS (Very, Very Slightly Included) and VS (Very Slightly Included) clarity grades come right next to top quality grades FL and IF (Internally Flawless).
There are considerable differences in the clarity of a diamond in each of the grades. If your budget does not allow you to buy an FL grade diamond, you can go for a VVS or a VS diamond ring. The key difference between these two diamonds is in the number of visible inclusions, but both can be good options when cut in the right shape.
This grade is further divided into VVS1 and VVS2 with the former being the higher grade. Diamonds with this clarity grade have slight imperfections that non-professionals cannot easily observe, even with the help of a microscope or loupe.
VS clarity is divided into VS1 and VS2, the former being a better grade. VS clarity diamonds contain inclusions that are difficult to see under 10x magnification. However, a few numbers of inclusions, although very tiny, can be readily visible to the naked eyes.