Every diamond is unique. Each reflects the story of its arduous journey from deep inside the earth to a cherished object of adornment. Yet all diamonds share certain features that allow us to compare and evaluate them.

A diamond's is classified based on the characteristics known as the "4 C's". Clarity, Color and Cut (proportion) are the quality elements which together with the Carat Weight determine the value of a stone. In an attempt to classify each & every stone’s characteristics as best is possible CM Group grades the diamond with following parameters.