Sandpaper Burs – Mixed Grits (10 Piece Pack)

Progressive Sanding | Gemstone Smoothing | Fine Surface Finishing

Grotto Gemstones Mixed Grit Sandpaper Burs are designed for progressive sanding, smoothing and refining gemstones after the initial shaping and grinding stages.

Featuring abrasive-coated surfaces, these versatile burs help remove grinding marks, refine gemstone contours and prepare surfaces for final polishing.

The selection of ten grit grades allows you to progress from initial sanding through to very fine surface preparation using a single convenient pack.

Suitable for working with Australian opals, quartz, agate and other compatible gemstones, including cabochons, carved stones and detailed lapidary projects.

What's Included

Each pack contains 10 sandpaper burs, with one of each grit grade:

• 240 Grit: Initial sanding and removal of coarse grinding marks.

• 400 Grit: Further smoothing and surface refinement.

• 600 Grit: Intermediate sanding and scratch reduction.

• 800 Grit: Smoothing and preparing for finer abrasives.

• 1000 Grit: Fine sanding and surface preparation.

• 1500 Grit: Refining smaller scratches and surface imperfections.

• 2000 Grit: Very fine sanding and smoothing.

• 2500 Grit: Advanced surface refinement.

• 3000 Grit: Extra fine sanding before final finishing.

• 5000 Grit: Ultra-fine surface preparation before polishing.

Features & Benefits

• Ten progressive grit grades for different sanding and finishing stages.

• Suitable for removing grinding marks and refining gemstone surfaces.

• Useful for cabochons, curved surfaces, contours and detailed lapidary work.

• Helps prepare gemstones for final polishing with suitable compounds.

• Convenient mixed grit selection for progressive sanding.

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

• Useful for Australian opals and a variety of other gemstones.

• Ideal for beginners, hobbyists and experienced lapidary enthusiasts.

Grotto Gemstones Workshop Tip

Begin with the grit appropriate for the condition of your gemstone and work progressively through finer grades.

Use light, controlled pressure and avoid excessive operating speeds, as friction can generate heat and potentially damage heat-sensitive gemstones, particularly Australian opals.

Ensure scratches from each previous grit have been removed before progressing to the next finer grade. Skipping stages can leave visible scratches that may become more noticeable during final polishing.

Important: Sandpaper burs are intended primarily for sanding and surface refinement rather than heavy material removal. For initi