When does GIA recommend repolishing diamonds?

• A. Refinishing a polished diamond to correct minor faults in its clarity or finish.
• B. Recutting to change the shape.
• C. Polishing for luster.
• D. When diamonds are noted to be improvables or potentials.

Answer: (D)

Repolishing is recommended when a diamond has been identified as improvable or having potential. If a lab report notes that the gem is improvable or a potential, it means there is room to enhance its surface quality or overall appearance through additional polishing. This is the specific situation GIA recognizes where repolishing could meaningfully improve the stone without changing its shape or fundamental cut.

Why this is the best choice: it ties directly to how GIA signals whether repolishing is appropriate—only when the stone is flagged as improvable or with potential do they endorse this service. Other situations described—refinishing to fix minor faults, recutting to change shape, or simply polishing for luster—do not align with the explicit lab-flag condition that prompts a repolish recommendation.