An informational pamphlet on sharpening stones, produced at an interesting point in history when both natural and synthetic stones were in common usage, and the sources of internationally traded natural stones were well known with active quarries. While one must bear in mind that as a promotional document the information within will hold certain biases, yet this provides a fascinating and seemingly often frank look into what went into the production of natural and synthetic sharpening stones during a major transitional period of history.

A full .PDF file of this document may be found here.