The cut of a diamond refers to the diamond’s level of quality and craftsmanship of the diamond cutter because it is what allows for the facets to reflect light. To determine the cut grade of a diamond, the Gemological Institute of America (GIA) calculates the proportions of those facets that influence the diamond’s face-up appearance.
Diamond clarity refers to the absence of inclusions. Very few diamonds are truly flawless. Natural diamonds are the result of carbon exposed to heat and pressure deep in the earth. This process can result in a variety of internal characteristics such as inclusions.
Diamonds color actually refers to their lack of color. GIA grades diamond color on a scale from D to Z, D being colorless and Z having a yellow or brown tint.