4C's

Clarity

Color

Carat-Weight

Cut

Carat - Weight

Bigger is bigger (and not necessarily better).

This is weight of the diamond measured in carats. One carat is divided
into 100 “points,” so that a diamond of 75 points weight .75 carats.
Carat-weight is the easiest of the 4C’s to determine. But two diamonds
of equal weight can have very unequal value, depending on their cut, color
and clarity. Fine quality can be found in diamonds of all shapes and sizes.
And a fine quality diamond is a little extra weight she’d be pleased to put on.