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Anyone have any ideas? Came in an extremely old paddle. The level of surface mirroring is ridiculous post lap and some burnishing. It is not a trans ark. Pingy, no oil smell at all, white slurry. Strange inclusions that under a loupe seem vaguely crystalline but do no harm.
https://youtu.be/DpxutmNjCmo
https://youtu.be/MSMtuMPiZkI
Can't get them to embed. Links work fine
Dont know, but it sure is pretty. Perhaps some sort of marble?
It would be easy enough to test for if I had some acid around
Don't damage the stones just for the sake of finding out what it is. It took some hundreds of millions of years to be formed... only to be destroyed by someone who will dip it into acid to see a reaction? At least, if you are determined to see it damaged, make some slurry and drop the powder it into vinegar to see if it bubbles.Quote:
Originally Posted by kcb5150
It's strange that France is such a big country yet we know so little about its stones, with 4 or so types known and another perhaps thousand unknown. If it's not a coticule or something from Germany, like the classic Frankonian, or the novaculite type of stone found there, it could be something unknown.
It's the edge that produces what matters, not the name.
No... I wouldn't dunk it in a vat of hcl... :D
The first edge was a korean frameback I have been periodically rehoning to get to stable steel and being due for another try I went to this off the coti. It was an aggressive hht5 root in off my hair which usually =no joke but true to form for this razor, the edge packed it in after a pass in the middle... At least it was just the middle of the edge this time vs the whole thing so I should be close to clean metal there. Going to try a filarmonica next, those just go out and do a good job with no complaining. The edge didn't have that telltale foil feel while it was alive fwiw
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It contines to burnish throughout testing.
Looks like one of those polished "sud-ouest" stones from the first video. Use it as polished is, or hit it with a coarse DMT and see?
I have owned one of those. Those are mud stones. This is decidedly not one of those. Idk. I just honed a pax on this which should be a real lie detector as that blade is completely fine and I am familiar with itAttachment 251564Attachment 251565
Shave tested. BBS. Whatever it is, it is a credible hone. Atg under the nose was effortless with no burn. More the smooth high level sharpness vs the more fizzy, brutal sharp you would get off of certain french finishers or some synths. Tbh, I have no idea. Seems to be something interesting lost to time
Main negative this has is it has no feedback whatsoever... No feeling of draw, no feeling of the stone pushing back the longer you stay on it, or smoothing out or anything. It tells you nothing, it's like you're honing on really hard greased wax. So weird. All I could really go by is edge interaction with the buffer and looking at the bevel with a loupe. Edge is actually quite forgiving. I pegged myself near my ear and what should have been a bad one just left a red mark. That's a big plus....
You mention a slurry as well as a stone polish, so I'm curious about the lapping sequence you used initially. Did you use it with a slurry in honing?
I have nothing to contribute. Regardless, I don't recall ever seeing hone inclusions like that before. I'm also intrigued by your feedback description of it being like hard greased wax yet having no feedback. I expected the usual glass comment.
I have seen inclusions shaped this way before but typically they had more definite crystalline strangeness. I had a coticule that was gray with orange inclusions that were soft and shaped like this. I got rid of it because they had a habit of releasing from the matrix and feeling horrible even though they seemed to do no harm. This doesn't seem to do that. As far as lapping I started at 120 and moved up through to 3000. I haven't felt the need to use the slurry as it seems to cut readily enough burnished as it is even. In my experience, slurry from stones that can cut that way tend to overcook an edge in a hurry. I have had that test on the back burner for when I have time to lap the other side. It's just really strange.
Finished a korean frameback on this tonight so I just wanted to show how the edge was behaving. With my hair this means good things usually.https://youtu.be/M53oFTVLvgs
Looks like a chert to me. It does form in layers as well as nodules.
You could always do a spark test to see if striking it with steel produces a spark.
This edge shaved great and this razor has done nothing but disappoint till now.
