Carat weight is the standard unit of measurement for diamonds. It is measured using a highly precise electronic scale. 1.00 carat is equal to 0.2 grams.
The colour grade refers to the degree to which colour is present. The less colour present, the rarer it is. The GIA Colour Scale ranges from D to Z. Grades D-E-F are in the colourless range. Grades G-H-I-J are in the near colourless range with only trace amounts of detectable colour.
Clarity refers to inclusions visible under 10X magnification. These clarity characteristics help determine quality and are often used to establish identity or whether the diamond is natural and untreated.
Cut refers to how well a diamond interacts with light. A well cut diamond will appear brilliant and full of life, while a poorly cut diamond will appear lifeless.
Polish refers to the quality of a diamond’s surface and is essential in maximizing a diamond's fire, brilliance, and scintillation.