Diamond Rings">Diamond grading involves evaluating the qualities of an individual dia¬mond and deciding how its qualities reflect its rarity and value.

This lab manual provides a clear and systematic way to accomplish consistent results with almost every diamond you grade.

Diamond value is based on the Four Cs—four factors that, in combi¬nation, provide a way to discuss diamonds and to compare one diamond to another. The Four Cs are clarity, color, cut, and carat weight.