The 4Cs of diamonds: the complete guide for professionals
The 4Cs — Carat, Color, Clarity and Cut — are the four fundamental criteria that define the quality and value of a natural diamond. Established by the GIA (Gemological Institute of America), they constitute the universal language of diamond trading. Mastering the 4Cs allows you to objectively compare stones and effectively advise your clients.
Review the available references and request confirmation of the status, price and timing applicable to your project.
These four criteria interact: a beautiful D color will lose its brilliance with a poor cut, and an FL diamond will lose value with strong blue fluorescence. This is why our team always analyzes the 4Cs in combination to recommend the best stones.