Diamonds 101: Reference Guide
The Diamond Carat Weight
A carat is a unit of measurement, it's the unit used to weigh a diamond. One carat is equal to 200 milligrams, or 0.2 grams.Carat is often confused with size even though it is actually a measure of weight. Sometimes, you might think a larger diamond appears more brilliant than a smaller one. This is because light must travel a greater distance through a larger diamond. The result is a prism effect that your eye registers as more brilliance and fire. Many people confuse carat and karat. Carat refers to the weight of a diamond while karat refers to the purity of gold (not weight).