Sintered Diamond Burs – Mixed Grits (10 Piece Pack)

Professional Quality | Five Grit Grades | Gemstone Shaping & Grinding

Grotto Gemstones Sintered Diamond Burs are designed for removing unwanted material, initial gemstone shaping, detailed grinding and preparing stones for finer sanding and polishing.

Manufactured using sintered diamond technology, these durable burs contain diamond abrasive throughout the working material, providing extended service life compared with conventional electroplated burs when correctly used and maintained.

Suitable for working with Australian opals, quartz, agate, tourmaline, topaz and other compatible gemstones.

What's Included

Each pack contains 10 assorted sintered diamond burs in five grit grades:

• 3 × Black – 80 Grit: Extra coarse grinding and initial material removal.

• 1 × Green – 90–100 Grit: Coarse shaping and grinding.

• 2 × Blue – 120 Grit: Medium grinding and refining.

• 2 × Red – 240 Grit: Fine shaping and surface preparation.

• 2 × Yellow – 600 Grit: Finer grinding before subsequent sanding and polishing.

The assorted bur shapes provide flexibility for gemstone shaping, contouring, detailed grinding and decorative lapidary work.

Features & Benefits

• Durable sintered diamond construction for extended working life.

• Five grit grades for different shaping and grinding applications.

• Assorted shapes for versatile gemstone work.

• Suitable for compatible rotary hand tools and flex-shaft machines.

• Useful for Australian opals and a wide range of other gemstones.

• Ideal for beginners, hobbyists and experienced lapidary enthusiasts.

Grotto Gemstones Workshop Tip

Always use suitable water cooling while grinding to help prevent overheating of both the bur and gemstone.

Use light, controlled pressure and progress through the appropriate grit grades for a smoother finish.

For ongoing maintenance, we recommend using a Grotto Gemstones Aluminium Oxide Sharpening Stone to help expose fresh diamond abrasive when the sintered burs become glazed or lose cutting efficiency.

Clean and dry your burs thoroughly after use.

Safety: Always wear suitable eye protection and use effective dust control. A correctly fitted P2 respirator is recommended where airborne hazardous dust may be present; wet grinding helps reduce dust but does not eliminate all exposure risks. Keep mains-powered tools and electrical connections protected from water, and follow the manufacturer's operating and electrical safety instructions. Children must be closely supervised, and powered grinding equipment should only be used by suitably trained operators.

Grotto Gemstones & Tools Australia

Supporting your gemstone journey, from rough to polished.