In our 4c’s blog we talked about Carat Weight and how it is commonly confused with the size of the diamond. Diamonds are sold by weight and not by visible size or measured diameter. The size of a diamond refers to the dimension measurements, while carat weight is just that, the weight of the diamond. Size can be used to estimate the weight of a diamond and vice versa, but it is not always accurate because there aren’t set measurements for each weight.