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No. First, the Norton flattening stone tends to not be flat, so you need to lap it flat first before you use it. :gaah: :rant:

Second, it really is not intended, nor works well, for natural...

Well, the upper one is a strop and the lower one appears to be some sort of slate. Hopefully it is a Thuringian! In order to try it out, all you need to do is flatten one of the larger surfaces and...