If you’ve done any research at all into diamond engagement rings, you’ve probably come across “The Four Cs” of diamonds. And you’ve probably already checked Wikipedia to find out exactly what each C is. But what sort of impact do the Four Cs really have on your search for an engagement ring? ColorDiamonds rated D through F are considered the most valuable, since they are the “whitest” or “clearest”, or as some stores will claim, the “purest”. But color is an incredibly subjective characteristic. A perfectly white diamond may seem cold and harsh to some, while a diamond with a…