Re: what did they use in the old days Just a guess, but shale of various varieties has been used for honing and sharpening stones..some of the best available, I'm told is from the "nonesuch" shale deposites along Lake Superior's south shore. Nonesuch is not named that because it is in fact none-such, but because of the Nonesuch mining operations that took place in the early 1800's in what now is the Porcupine Mtns State Park, in Ontonagon and Gogebic Couties of Upper Michigan. Because most of this shale deposit is located within the confines of the park, it has not been exploited to any great degree. I have a small piece that I picked up on the lake shore, and it does work well, after some work at getting it flattened to shape.
Al |