A diamond’s quality is determined by the 4C’s:
Cut: Quality of the angles, proportions, facets, and finishing details.
Color: How colorless the diamond is.
Clarity: How clean the diamond is of inclusions and blemishes.
Carat: The weight of the diamond.
These four qualities of a diamond are the key components that impact its beauty and structure. The 4C’s interact with each other within the diamond. They dictate how the diamond appears and how high quality it is. As an example, the diamond’s ability to reflect light back to your eyes depends primarily on cut quality but also on color and clarity.