Would you prefer an F, SI1? Or an H, VS2? Or finally an I, VS1? I have been trying to purchase some earrings for my girlfriend and can't seem to see where the tradeoff should be. Does color matter more than clarity? I am trying to buy one that is best as seen by the naked eye, neither I or her are going to be taking this thing to a microscope, so I decided to turn to the experts! Any help would be greatly appreciated, thank you!