Which girdle characteristic can contribute to poor value by affecting face-up size?

• A. Thick girdle
• B. Thin girdle
• C. Medium girdle
• D. Girdle width has no impact

Answer: (A)

The key idea here is how girdle thickness affects the top-view size, which buyers use to judge value. A thick girdle puts more mass around the stone’s edge without proportionally increasing the visible diameter from the face-up view. In other words, for the same carat weight, much of the weight is in the girdle rather than in the crown/pavilion facets that determine how large the diamond looks from the top. That can make the face-up size appear smaller or less optimal in proportion, reducing perceived size and, therefore, value per carat. A girdle that is excessively thick is less efficient at contributing to a desirable face-up appearance, even though the stone may weigh more.

By contrast, a moderate girdle thickness tends to balance weight distribution well and maintains a good face-up appearance, while extremely thin girdles raise durability concerns without necessarily improving face-up size. This is why the thick girdle option best explains a potential poor value due to face-up size.