Buying a diamond? Why 'cut' matters more than carat

We spend months obsessing over the 'Carat' size of a diamond, imagining how big it will look on a finger. But ask any gemologist, and they will tell you the uncomfortable truth: a massive diamond with a bad cut is just a dull rock. The 'Cut' is the only one of the 4Cs (Cut, Color, Clarity, Carat) that is dictated by human skill rather than nature. It determines whether your stone sparkles like a disco ball or looks like a piece of glass. If you are planning a purchase this wedding season, here is the cheat sheet...