Thread: Dragons Tongue Hone anyone?

fantastic, thanks so much for sharing that, brilliant information, this thread gets better and better, thanks to everyone who has contributed so far.

Ive been googling and asking around for further info on the welsh hone stones, particularly the so called greenstone which intrigued me and which may or may not be any good at all for razors. It did sound like an igneous rock which would be unlikely for a hone and I wasnt getting very far at all, then I chanced upon this in an 1866 journal pertaining to the geology of Snowdonia that just happened to be scanned online
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Greenstones. I shall now explain in detail the mode of occurance of the greenstone rocks on and around Snowdon,

These have heretofore only been incidentally alluded to. They are intrusive and excepting a few narrow dykes, they are of lower silurian age. It is needless to describe each one; but a few of the principal masses may specially noticed. All of them are hornblendic. Between Pen-Y-Gwryd and Cribiau five patches pierce the stratified rocks and the overlying felspathic porphery. They lie about the same level with those near Dolwyddelan and Moel Siabod, are dark green, and distincly but not largely crystalline, hornblende predominating, and they alter the rocks with which they are in contact.

The line of greenstone about a mile in length that passes through Llyn-Y-Cwm-ffynnon is well crystallised, slightly branching at its south east end where the slaty rocks in contact with it are altered, and quarried for hone stones.
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So I have a location and from this I am going to guess that the greenstones are not green stone at all but slate that was adjacent to and metamorphosed by the greenstone