Cut grade, Carat weight, Color grade and Clarity grade. Today, the 4Cs of diamond quality are the universal method for assessing the quality of any diamond. The creation of the Diamond 4Cs mean two very important things: diamond quality can be communicated in a universal language, and diamond customers know exactly the quality of the diamond they are purchasing.   Visit our Diamonds page for more information about how we select and curate our diamonds for Oui by Jean Dousset Engagement Rings. You can also read more about the 4Cs on our blog, The Rough Cut.