The Diamond Carat Size Chart
When it comes to diamonds, carat is probably one of the attributes most often misunderstood as many believe carat refers to the actual size of a stone. In fact, carat refers to the weight of a diamond as opposed to its physical size, though the two are related. Beyond carat, a variety of factors can influence the apparent visual size of a diamond, including the diamond cut grade and shape of the stone. Together, these elements determine the price at which a diamond is sold to the consumer, whether natural diamonds or lab grown diamond alternatives. Understanding the influence of these factors will help you determine the best option for your budget for simulated diamond jewelry.
For carat size comparisons, it is easiest to see the differences when using a diamond size chart. One way to better understand it is to look at different shapes, like a round cut diamond, and how they will visually appear at different carat sizes. Here is a helpful carat size chart to aid you in visualizing how a diamond’s shape and carat influence how its physical size appears.
While carat is the standard unit of measurement, the millimeter size measurement of a diamond tells you its true physical size. This is important when considering the faceting and shape because, as you can see in the diamond weight chart above, certain shapes will appear larger in size at equivalent carat weights. Oblong shapes specifically, such as emerald, oval, or pear, often look larger than their round counterparts. When shopping for diamonds, the carat weight, as well as millimeter measurements, can always be found on the Gemological Institute of America (GIA) certificate of the diamond.