Carat refers to the weight of the diamond. One carat is equivalent to 200 milligrams. Larger diamonds are rarer and therefore often more valuable.
Colour is graded from colourless to yellow or light brown and is measured on a scale from D (colourless) to Z (light colour). Colourless diamonds are the rarest and most valuable.
Clarity measures the clearness or purity of the diamond and is graded by the presence of inclusions and blemishes. Grades range from Flawless (no inclusions visible under 10x magnification) to Included (inclusions visible to the naked eye).
Cut evaluates how a diamond’s facets interact with light. Precise artistry and workmanship are required to fashion a stone so its proportions, symmetry, and polish deliver the magnificent return of light only possible in a diamond. A well-cut diamond will appear brilliant and fiery, while a poorly cut diamond can appear dark and lifeless.