Gesswein Stones

Browse our selection of polishing stones for a variety of applications.

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Exacting Standards

  • Pure Composition

    Our stones are composed of the purest aluminum oxide, levigated alumina, and silicon carbide.

  • Careful Grading

    For each grit, meticulous grading removes oversized grains, eliminating any possibility of scratching or gouging.

  • Uniform Results

    Highest standards of bonding, firing, and cutting ensure an absolutely uniform finish.

Made in USA

We are proud that our Polishing Stones are made locally in Old Saybrook, Connecticut. The proximity of our manufacturing facility allows us to execute a higher degree of quality control and raise our overall standards. More importantly, this also allows us to build and grow at home.

Which Gesswein® Stone is Right for You?

The following chart contains helpful information to guide you in selecting the appropriate finishing stone based on your application and surface type. Need more tailored advice? Our technical team can assist you in finding the optimal stone for your needs.

Stone Abrasive Grain Bond Hardness Breakdown Ratio Wet or Dry Recommended Metals
Ultra-Soft White
Aluminum Oxide		 Vitrified Very Soft Very Fast Wet & Dry Mold and tool steels including P20, 420SS, and soft non-ferrous metals such as Aluminum, Beryllium, and Kirksite.
Rough Out Aluminum Oxide Vitrified Very Soft Fast Wet & Dry Hard and soft tools as low as Rockwell, C25. Soft non-ferrous metals such as Aluminum, Beryllium, and Kirksite.
General Purpose White
Aluminum Oxide		 Vitrified Medium Moderate Wet All tool steels of all hardness such as A2, D2, M2, S7, and H13.
Moldmaker Black
Silicon Carbide		 Vitrified Medium Soft Fast Wet Hard and soft tools as low as Rockwell, C25. Soft non-ferrous metals such as Aluminum, Beryllium, and Kirksite.
Diemaker Brown
Aluminum Carbide		 Vitrified Medium Moderate Wet & Limited Dry All mold and tool steels of all hardness such as A2, D2, S7, H13, P20, 420SS and soft non-ferrous metals such as Aluminum, Beryllium, and Kirksite.
Ruby Rough Out Ruby
Aluminum Carbide		 Vitrified Medium Moderate Wet & Dry All tool steels of all hardness such as A2, D2, M2, S7, and H13. Soft non-ferrous metals such as Aluminum, Beryllium, and Kirksite.
Super Fine Aluminum Carbide Vitrified Medium Moderate Fast Wet & Dry All tool steels of all hardness such as A2, D2, M2, S7, and H13.
G2 Brown
Aluminum Carbide		 Vitrified Medium Slow Wet Ideal for steels such as P20, H13, and 420SS.
Oil-Treated White
Aluminum Carbide		 Vitrified Medium Hard Moderate Wet & Limited Dry All tool steels of all hardness such as A2, D2, M2, S7, and H13.
Mold Maker PLUS Green
Silicon Carbide		 Vitrified Medium Hard Moderate Fast Wet All mold and tool steels of all hardness such as A2, D2, S7, H13, P20, 420SS and soft non-ferrous metals such as Aluminum, Beryllium, and Kirksite.
Premium White White
Aluminum Carbide		 Vitrified Medium Hard Slow Wet All tool steels of all hardness such as A2, D2, M2, S7, and H13.
EDM White
Aluminum Carbide		 Vitrified Hard Slow Wet Medium and Hard tool steels as high as Rockwell C62.
EDM Blue White
Aluminum Carbide		 Vitrified Very Hard Slow Wet Medium and Hard tool steels as high as Rockwell C62.
RA Aluminum Carbide Resin Very Hard Slow Wet All tool steels of all hardness such as A2, D2, M2, S7, and H13.