Final Polishing Laps – Mirror Finish Laps for Cabochons & Faceted Gemstones

Final polishing laps are specialty laps engineered for the last stage of the lapidary polishing sequence. Designed to deliver a mirror-quality finish on both cabochons and faceted gemstones, these laps work with ultra-fine polishing compounds to eliminate pre-polish scratches and bring out maximum brilliance and clarity in the finished stone.

Related Collections

• Zinc Laps
• Tin Laps
• Leather Laps
• Phenolic Laps
• Sintered Faceting Laps
• All Polishing Laps

Frequently Asked Questions

• Q: What is a final polishing lap used for?
  A: A final polishing lap is used in the last stage of the lapidary polishing sequence to remove any remaining pre-polish scratches and achieve a mirror-quality finish. It is used after pre-polish laps and before the stone is considered complete.
• Q: Which final polishing lap is best for sapphire?
  A: A tin lap charged with 0.1–0.25 micron diamond paste is the preferred choice for achieving a mirror finish on sapphire and other corundum-group minerals (Mohs 9).
• Q: Can I use cerium oxide on a final polishing lap?
  A: Yes. Cerium oxide is an excellent final polish compound for softer stones (Mohs 5–7) on leather or phenolic laps. For harder stones, ultra-fine diamond paste (0.1–0.5 micron) typically produces a brighter result.
• Q: Do I need a separate lap for final polishing?
  A: Yes. It is strongly recommended to use a dedicated lap for final polishing to avoid cross-contamination from coarser compounds used in earlier stages. Even trace amounts of coarser grit can introduce scratches during the final polish stage.
• Q: What sizes are final polishing laps available in?
  A: Final polishing laps are available in standard 6-inch and 8-inch diameters to fit most flat lap and faceting machines. Browse Final Polishing Laps →