Carats are broken down into a simple system of points:

• 100 points would be the equivalent of 1.00 ct. or a 1 carat diamond.

• 125 points = 1.25 ct. or 1¼ ct.

• 150 points = 1.50 ct. or 1½ ct.

This is pretty simple to understand, but as you proceed you’ll understand why it is important to know the "exact" weight.