3M™ Microfinishing Diamond 4-pc Kit


Perfect for repairing chips in gemstones or sharpening carbide tools. For lapidary work, use these steps before the 3M Polishing Diamond abrasives. This kit includes the following grades: 74, 45, 30, 20 Micron – 1 of each. Patented 3M™ Microfinishing Diamond Abrasive Grain.


Our industrial grade 3M Microfinishing diamond abrasives are perfect for hard materials such as semi & precious stones, carbides, cobalt, tungsten, chilled iron, etc. Use wet or dry.

Uses for Microfinishing Diamond Abrasives include:

For Lapidary & Watch Crystal: Ideal for cutting & shaping stones as well as smoothing out chips. Also removes heavy to fine scratches on watch crystals.
For a higher polish on your stones or glass, use the 3M™ PREMIUM Polishing Diamond Kit after these Microfinishing Diamond abrasives.
For Carbide Tools: Sharpen router bits, forstner bits, shaper cutters and various other tools & remove chips. The sharper-than-factory finish reduces heat build-up during tool operation.

Additional information

Weight 0.1 lbs
Dimensions 8 x 3 x 1 in

1 of each: 74, 45, 30, 20 Micron 3M™ Microfinishing Diamond Discs


3M Material Safety Data Sheet


Lapidary Instructions