Polishing – Main Lesson

Unit 10: Polishing Gemstones

What’s This All About? 

Spa day for gems! Jake teaches us why gemstones need polishing and how proper care keeps them looking spectacular forever.

Key Takeaways: 

• Why polish gemstones:
  • Removes scratches, nicks, and surface damage that dulls the stone’s appearance
  • Restores the mirror-like finish that creates brilliance and sparkle
  • Makes gemstones look their absolute best by perfecting light reflection 
• Common causes of gemstone wear:
  • Daily handling and contact with skin oils
  • Improper storage where stones rub against each other
  • Contact with harder materials that can scratch softer gems
  • Exposure to harsh chemicals or cleaning products 
• Professional polishing process:
  • Step 1: Shape correction using coarse grinding wheels
  • Step 2: Progressive smoothing with increasingly fine abrasives
  • Step 3: Final buffing with polishing wheels and specialized compounds
  • Step 4: Quality inspection under magnification 
• Required equipment:
  • Various grits of grinding wheels and sandpaper
  • Polishing wheels (felt, leather, or specialized synthetic materials)
  • Polishing compounds like diamond paste or cerium oxide
  • Safety equipment (goggles, gloves, respirator, proper ventilation) 
• Maintenance frequency guidelines:
  • Frequently worn jewelry (like engagement rings): every 2-3 years
  • Occasionally worn pieces: every 5-10 years or as needed
  • Well-cared-for gems might never need repolishing 
• Preventive care strategies:
  • Store each

International Gem Society

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