Flexible Diamond Sheets

Professional flexible diamond abrasive sheets in sandpaper sheet and precision lapping film roll formats. Diamond sandpaper sheets are available in multiple dimensions (from 80x30mm strips up to 650x290mm full sheets) across 60 to 1800 grit for manual sanding and contoured finishing of glass, stone, ceramics, and gem materials. Diamond lapping film rolls are available in widths from 30mm to 101.6mm and lengths up to 45M in 0.5 to 80 micron grades for ultra-precision lapping of optical components, fiber optics, ceramics, and high-hardness gem facets. PSA backing options enable direct mounting onto flat lap platens and custom fixtures.

Available Sizes and Pricing

Format Size Grit / Micron Range Price
Diamond Sandpaper Sheet 80 x 30mm (strips) 60 – 1500 grit $9.00
Diamond Sandpaper Sheet 100 x 55mm 60 – 1800 grit $38.00
Diamond Sandpaper Sheet 100 x 100mm 60 – 1800 grit $38.00
Diamond Sandpaper Sheet 130 x 55mm 60 – 1800 grit $36.00
Diamond Sandpaper Sheet 280 x 230mm 60 – 1800 grit $55.00
Diamond Sandpaper Sheet 300 x 290mm 60 – 1800 grit $120.00
Diamond Sandpaper Sheet 650 x 290mm 60 – 1800 grit $185.00
Diamond Lapping Film 5-Pack 280 x 220mm 0.5 – 80 µm from $16.00
Lapping Film Roll 30mm x 10M 0.5 – 80 µm $100.00
Lapping Film Roll 55mm x 20M 0.5 – 80 µm $160.00
Lapping Film Roll 101.6mm x 5M 0.5 – 80 µm $150.00
Lapping Film Roll 101.6mm x 10M 0.5 – 80 µm $200.00
Lapping Film Roll 101.6mm x 45M 0.5 – 80 µm $1,200.00

Abrasive Type Guide

Abrasive Best For Grit / Micron
Diamond Hard gemstones (Mohs 6+), glass, ceramics, fiber optics, precision optics 60 grit – 0.5 µm
Silicon Carbide Stone, glass, ceramics — aggressive stock reduction 1 – 60 µm
Aluminum Oxide Glass, ceramics, softer gem materials — smooth pre-finishing 0.3 – 40 µm

Compatible Applications

  • Hand sanding and contour smoothing of lapidary stone, agate, jasper, quartz, and art glass
  • Precision lapping of optical components and fiber optic connectors
  • Ceramic and porcelain surface smoothing and edge prep
  • Flat lap platen resurfacing with PSA peel-and-stick backing
  • Custom-cut lapping fixtures — continuous rolls cut to any needed geometry
  • Pre-polish and final polish stages on hard gemstone materials
  • Precision edge hone for fine blades and carving chisels

Related Tools

Frequently Asked Questions

  • Q: What is the difference between diamond sandpaper sheets and diamond lapping film?
    A: Diamond sandpaper sheets utilize a flexible cloth backing with electroplated diamond particles, engineered for manual sanding and shaping of stone, glass, and mineral specimens across 60 to 1800 grit. Diamond lapping film features a tight-tolerance polyester substrate coated with calibrated micron diamond particles (0.5 to 80 µm) for critical surface flatness and optical-grade finishes.
  • Q: What size diamond sheet should I choose for hand sanding lapidary stone?
    A: For individual cabochons and specimens, 100x55mm or 100x100mm sheets are ideal for handheld control around complex curvatures. For flat slabs or larger carvings, 280x230mm or 300x290mm sheets provide greater surface contact. Continuous 650x290mm and 850x290mm formats serve bench-mounted sanding stations.
  • Q: What micron grade lapping film should I use for gemstone pre-polish and polish?
    A: For initial gemstone pre-polish, select 9 to 15 µm diamond lapping film. For fine pre-polish, transition to 3 to 5 µm. For a mirror final polish on hard stones (Mohs 7+), finish with 0.5 to 1 µm film.
  • Q: Can diamond lapping film rolls be cut to custom sizes?
    A: Yes. Rolls can easily be trimmed with standard scissors or rotary shears to fit custom polishing platens, drum setups, or specialized lapping jigs.
  • Q: How does the PSA backing option work?
    A: Pressure-Sensitive Adhesive (PSA) allows you to peel off the protective liner and firmly mount the film or sheet directly onto clean master support laps or backing plates without requiring aerosol adhesives.