A gemstone with a thin metallic foil or mirroring film applied to its pavilion is called?

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Study for the Diamond and Diamond Grading Exam. Enhance your skills with flashcards and multiple-choice questions, complete with explanations and insights. Get ready to excel in your diamond grading journey!

Multiple Choice

A gemstone with a thin metallic foil or mirroring film applied to its pavilion is called?

Explanation:
Foilback describes a thin metallic foil placed on the pavilion to act as a light reflector. This backing redirects light that would otherwise escape through the bottom back into the gem, boosting brightness and sparkle. The other terms refer to different aspects—finish is about surface polish, girdle thickness is the width of the stone’s girdle—so only foilback captures the idea of a reflective back layer. This is why the term fo ilback is the correct description for that feature.

Foilback describes a thin metallic foil placed on the pavilion to act as a light reflector. This backing redirects light that would otherwise escape through the bottom back into the gem, boosting brightness and sparkle. The other terms refer to different aspects—finish is about surface polish, girdle thickness is the width of the stone’s girdle—so only foilback captures the idea of a reflective back layer. This is why the term fo ilback is the correct description for that feature.

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