Which term refers to fine, parallel grooves and ridges left by polishing that do not cross facet junctions and are transparent or white?

Which term refers to fine, parallel grooves and ridges left by polishing that do not cross facet junctions and are transparent or white?

• A. Pinpoint
• B. Pit
• C. Polishing
• D. Polish Lines (PL)

Answer: (D)

Polish lines are the fine, parallel grooves and ridges left on a diamond’s surface from the polishing process. They run in the direction the lap moved and do not cross facet junctions, which helps distinguish them from other surface markings. Because they’re shallow and align with the polishing action, they often appear as transparent or white lines under magnification. This makes the term Polish Lines the exact description for this surface feature. Pinpoint would refer to tiny inclusions, pits are small surface hollows, and polishing describes the process rather than a surface mark.

Polish lines are the fine, parallel grooves and ridges left on a diamond’s surface from the polishing process. They run in the direction the lap moved and do not cross facet junctions, which helps distinguish them from other surface markings. Because they’re shallow and align with the polishing action, they often appear as transparent or white lines under magnification. This makes the term Polish Lines the exact description for this surface feature. Pinpoint would refer to tiny inclusions, pits are small surface hollows, and polishing describes the process rather than a surface mark.