Crystolon Stone for Edge Pro - Gritomatic

Crystolon Stone for Edge Pro

For Hapstone and Edge Pro knife sharpeners (Edge Pro format)
$33.00 USD 📊 Grit Chart


Crystolon Stones are used for coarse sharpening knives on Hapstone Pro sharpeners. Crystolon is one of the oldest sharpening stones in the USA. Crystolon stones are made of oil treated silicon carbide. All Crystolon stones are 6 mm thick and are mounted on high quality aluminum blanks.

It is advisable to use Crystolon stones to sharpen knives made of hard stainless or carbon steel. Use of Crystolon stones to sharpen knives made of soft steel is not recommended - use India instead.


  • Product size: 160 x 25 x 9 mm (6" x 1" x ⅓")
  • Weight: 80 g (3 oz)
  • Abrasive: Pre-oiled Bonded Silicon Carbide
  • Extra materials: Aluminum Blank, oil-resistant glue

How to use

Crystolon Stones may be used with oil as lubricant, or without lubricants at all.

    Crystolon Stones do not have any minor defects.

    Crystolon Stones do not require any preparations.

    Q & A

    • Why grit value is specified instead of coarse, medium or fine, like bench Crystolon stones?

      It's for a comparison reason. Crystolon Coarse is J 120, Crystolon Fine is J 280. We prefer avoiding Norton naming because Crystolon Fine is a coarse stone. Please see our grit chart for more information about conversions.

    • Are Norton stones really original? Why are they not available on the web site of Norton?
    • Many final products are made by Gritomatic. We buy Norton sharpening stones from international distributors, perform cutting, flattening and lapping, and mount the stones to blanks. We keep the names of the original sharpening stones in the names of the finished products, as well as the countries of origin of these stones.

    About Norton

    Norton. The birth of the sharpening stone industry in the United States dates back to 1823 in New Hampshire. A farmer discovered that stones in his pasture were ideal for sharpening scythes and axes. This excellent deposit of mica schist became the foundation for the Pike Company – the first supplier of commercially available natural sharpening stones in North America. As time went on, the company expanded its original product offering to include over twenty varieties of natural stone, including the Arkansas line. Quarried from the novaculite deposits near Hot Springs, Arkansas, these stones soon replaced mica schist as the quality standard in premium natural sharpening stones. As Norton developed its position in synthetic abrasives, Pike Company complemented its natural stone line with the new aluminum oxide and silicon carbide bonded abrasives. This strengthened its position in that portion of the market requiring fast-cutting, heavy-stock-removing sharpening stones. In 1932 Norton Company purchased the Pike Company. Norton Company was subsequently purchased by Saint-Gobain Abrasives, Inc. (the global leader in abrasive sales and technology). Norton continues to serve world markets with the broadest line of natural and synthetic sharpening stones available.

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    Questions and answers

    If you have a question regarding this product, please feel free to ask.