Boride Engineered Abrasives
- Manufactures abrasive stones for industrial applications including mold and die polishing, conditioning diamond wheels and glass grinding.
- http://www.borideabrasives.com/

Stick & Stones Unlimited Inc.
- Produces sharpening stones, honing and dressing sticks, and oil stones.
- http://www.sticksandstonesunl.com/

DeepMaya Engineering
- Manufactures and exports honing stones and products from India.
- http://www.deepmayaengineering.com/

Ardennes Sprl.
- Quarries and fabricates Belgian natural abrasive stones for sharpening and removing the wire edge from blades used for cutting.
- http://www.ardennes-coticule.com/