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Diamonds range in color from colorless to yellow. Even though most diamonds appear colorless to the untrained eye, the majority of diamonds contain traces of yellow or brown. The closer the stone is to colorless, the more valuable the diamond.

Most diamonds contain very tiny natural birthmarks known as inclusions. However, the fewer and smaller the inclusions are, the less likely they will interfere with the passage of light through the diamond, and the more beautiful the diamond will be. Diamond is nature's material that is most capable of producing a maximum amount of brilliance. A diamond that is free of both inclusions and surface blemishes is very rare and therefore more valuable.

This is the weight of the diamond measured in carats. One carat is divided into 100 'points', so that a diamond of 75 points weighs 0.75 carats. Carat weight is the easiest of the 4 C's to determine. But two diamonds of equal weight can have very unequal value, depending on their cut, color and clarity.

Diamond cutting techniques have been refined since the fifteenth century when master craftsmen passed down their art form from generation to generation. Today, the finest diamond cutting still occurs in the hands of a skilled craftsman. Cut determines the fire and brilliance of the diamond. If the diamond is cut with just the right proportions and at certain precise angles, the stone's ability to reflect and refract light will be maximized. When a round diamond is cut to ideal proportions, light will bounce freely within the diamond, and reflect back out of the crown without escaping through the opposite side or the bottom of the stone. The skill and experience of the diamond cutter will determine the stone's brilliance and scintillation.