Carat refers to the weight of a diamond.
Carat is often confused with size even though it is actually a measure of weight. One carat is equivalent to 200 milligrams. One carat can also be divided into 100 “points.” For example, a .75 carat diamond is the same as a 75-points or 3/4 carat diamond.
Cut and mounting can make a diamond appear larger (or smaller) than its actual weight. So shop around and talk to your jeweler to find the right diamond and setting to optimize the beauty of your stone.