200 milligrams
A carat is divided into 100 points, so a 0.75 ct diamond can also be described as 75 points.
Carat is weight,
not diameter.
One metric carat equals 200 milligrams. Carat describes weight; it does not directly tell you how large a diamond will appear face-up.
Dimensions matter
Length, width and depth help explain how the diamond's weight is distributed and how much surface area is visible from the top.
Shape changes spread
Round, oval, emerald, pear and other shapes distribute weight differently. Compare measurements within the same shape when evaluating face-up size.
Compare carat + measurements + proportions.
Do not choose a diamond from carat weight alone. Review its measurements, proportions, grading report and actual appearance.