Beyond size, which factors can affect the grade-setting characteristic in clarity evaluation?

• A. Carat weight, depth, and fluorescence.
• B. Number, location, nature, and relief.
• C. Origin and cut style only.
• D. Polish quality and symmetry.

Answer: (B)

In clarity evaluation, how clear a diamond appears is shaped by features inside the stone and how conspicuous they are under normal viewing conditions. Beyond size, the four factors that most influence the grade-setting are the number of inclusions, their location, their nature, and their relief.

• Number: More inclusions generally lower the clarity grade because there are more features that can be seen with the eye or under magnification.

• Location: Inclusions that sit in the center or along sightlines are more likely to be noticed, while those tucked away in less-critical areas tend to have a smaller impact.

• Nature: The type of inclusion (for example, crystals, feathers, or fractures) matters because different types interact with light and the diamond’s structure in distinct ways, affecting visibility and how they interrupt clarity.

• Relief: This describes how much the inclusion stands out from the surrounding crystal. High-relief features tend to be more visible and thus more detrimental to clarity than low-relief ones.

Other aspects like depth or carat weight relate to size, while polish, symmetry, or attributes such as origin or cut style pertain to other evaluations. Fluorescence can influence appearance in some lighting but is not a primary factor used to set the clarity grade itself.