The 4Cs

The 4Cs of diamond quality are cut, clarity, colour, and carat weight.

The 4Cs system was originally developed by the Gemological Institute of America (GIA) to characterise the quality of polished diamonds. 

Along with broader market conditions for diamonds, the 4Cs of diamond quality are the most important factors that influence the value of diamonds.

Learn more about the 4Cs of diamond quality, starting with the first of the 4Cs — Cut (also known as Make).

The First 4C: Cut (Make)