Selecting you diamonds clarity. The GIA diamond clarity scale starts at F (flawless), which is the cleanest diamond meaning the diamond is without any carbon spots which are black specks or anything else that would take away from the clearness of the diamond. This is also the highest in price. Next on the scale is IF (internally flawless), VVS 1 & 2, VS1& 2 , SI 1& 2 , I ,1,2 & 3 as the scale goes down the more included the diamond becomes. The best way to save money is to go with a medium clarity diamond in which the flaws in the diamond can be positioned under prongs or hidden in the setting.