A diamond’s weight is measured in what is known as a ‘carat’, which is a small unit of measurement equal to 0.2 grams. One carat is divided into 100 points. A diamond weighing one quarter of a carat can also be described as weighing 25 points or 0.25 carats. Points are generally not used to describe weights over one carat. Carat is not a measure of a diamond’s size, since cutting a diamond to different proportions can affect its weight. Most people compare carat weight to size. The larger the diamond the more it weighs. Here are some examples of different weights for round diamonds and their corresponding sizes. These may not be actual size due to your monitor. The approximate girdle diameter is displayed in millimeters.

The most important thing to remember when it comes to a diamond’s carat weight is that it is not the only factor that determines a diamond’s value. In other words, bigger does not necessarily mean better. All 4 Cs—Cut, Color, Clarity and Carat Weight must be balanced, nor is any one more important than the others.