Diamond Sizes

Carat refers to the weight of the diamond. When reading a product description for a diamond ring or diamond earrings, you may notice that the carat size is one of the first things listed. That's because carat separates the big diamonds from the small, and for many consumers, it's the #1 consideration when diamond shopping.


How Big is a Carat?


A carat is a unit of measurement equal to 200 milligrams. Heavier diamonds are more valuable because they appear much less frequently in nature, which makes them scarce and highly desirable. Carats are assessed not only by weight, but also by points. One carat is equal to 100 points, so a .5-carat diamond is equal to 50 points, and a 2-carat diamond is worth 200 points.


Greater weight amounts not only to greater value, but it also allows for greater detail and brilliance. Light has a much larger canvas for refraction on a 2.50-carat diamond than on a .10-carat diamond, and the details are more readily visible and prominent. While a 2.50-carat diamond ring boasts a magnificent appearance, diamonds can actually be more than 100 carats in mass, such as the famous Paragon.


Carat Sizes


Diamond size chart


A one-carat diamond is equal to 6.5mm in width, on average. The width can vary based on the cut. By the same measurement, a two-carat diamond is about 8.2 mm in size. As diamonds become larger and heavier, imperfections become more apparent. For this reason, carat size is a bit of a double-edged sword. On the one hand, greater size indicates greater value in the diamond world, but on the other hand, greater size can also magnify other flaws. So the greater your carat size, the more you must also be mindful of the color, clarity and cut.


Two diamonds with the same carat size can vary dramatically in price, based on the other aforementioned qualities. If you're concerned about the overall presentation of the diamond but don't want to spend a fortune, you may want to opt for a slightly smaller diamond with fewer imperfections.