- Thread starter
- #21
That’s very helpful thanksYou might have better luck with a piece of that slate that hasn't been sitting in water. It's likely that somewhere up stream there is an exposed face of that layer. There also may be harder parts of that layer that have not eroded into the stream.
I once read that only 1% of the sharpening stones coming out of the Japanese mines were of razor quality and the rest were sold for knives and tools. I keep that in mind while stone hunting. You could hit the jackpot only to pick up the wrong stone to test.