Understanding What Diamond Carat Weight Means
Diamonds are broken down into carats and points. 100 points = 1.00 carat (like the US currency system). Keep in mind Carat weight refers to weight, not to be confused with size (diamonds are measured in millimeters). You should care more about how a diamond looks than what it weighs. You want to pay for what makes a diamond beautiful, not what adds extra weight.
That's why Hearts On Fire diamonds are cut for beauty and consistency, not for size. That's why a smaller Heart On Fire diamond may actually be more beautiful than a larger non-HOF diamond due to its superior cut and polish.