Which of the following factors is NOT considered in diamond clarity grading?

In diamond clarity grading, several specific characteristics are evaluated to determine the overall clarity of a diamond, which reflects its purity and absence of inclusions or blemishes. Key factors considered include the position and number of inclusions, as well as the color of any blemishes present within the stone.

The position of inclusions can significantly impact a diamond's appearance, as inclusions closer to the surface may be more noticeable. The number of inclusions also plays a vital role, since a higher quantity can detract from the diamond's clarity and visual appeal. The color of blemishes is equally important, as certain colors may be more visible against the diamond's surface, therefore affecting the clarity grade.

Carat weight, on the other hand, is not a factor in clarity grading. While carat weight reflects the size of the diamond and can influence its value, it does not provide any information about the diamond's internal or external features related to clarity. Clarity grading focuses explicitly on the presence and characteristics of inclusions and blemishes, making it distinct from the factors associated with weight.