Interesting history associated with these cotis!
https://www.youtube.com/watch?v=lV_CxBvXL3k
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Interesting history associated with these cotis!
https://www.youtube.com/watch?v=lV_CxBvXL3k
Indeed very interesting, thanks for sharing!
It's a remarkable rock with many capabilities.
It makes you wonder why some fellow several hundred years ago decided to pick up a random rock from the ground and rub his blade on it only to find out how it improved the edge.
Now that I think of it, we have some SRP members who still do the same thing.:hmmm:
The romans were mining coticules, so that is at least a few thousand years ago.
I just ordered a brick of a book from France “ Ardoise et coticule en terre de Salm”
Should be quite a “mine” of information.