Natural pocket stone from Lombardi

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Papilio

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Hello,
does anybody use (or know about) this stone Natural sharpening stone from Lombardi ? I bought this stone some time ago, used it a while and then I put it in a drawer and used synthetic pocket stones. But I have a liking for natural stones. This small stone from Lombardi is a natural stone (what makes it difficult to give an exact grit), but compared to a synthetic stone, what could the approximate grit be? Guesses - from what I read about this stone - range from 600 to 4000. Does anybody have reliable information?
It seems to be quite fine, nothing for reprofiling. I would say, it is finer than a Soft Arkansas. But then we speak again about 600+.
 
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Papilio said:
Hello,
does anybody use (or know about) this stone Natural sharpening stone from Lombardi ? I bought this stone some time ago, used it a while and then I put it in a drawer and used synthetic pocket stones. But I have a liking for natural stones. This small stone from Lombardi is a natural stone (what makes it difficult to give an exact grit), but compared to a synthetic stone, what could the approximate grit be? Guesses - from what I read about this stone - range from 600 to 4000. Does anybody have reliable information?
It seems to be quite fine, nothing for reprofiling. I would say, it is finer than a Soft Arkansas. But then we speak again about 600+.
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The site says the stones are "made in Italy" from quartz etc. They are synthetics imo..diamonds are naturally occurring also. As far as grit goes? No idea.
 
It is probably good for touching up.
To me it looks like some sort of slate.

I thought they were blue coticule till I saw the made in Italy. If I saw one of these at a hardware store I would plop down 9 bucks to check it out.
 
Hi
stefanwolf88 is gone (r.i.p.) but his videos remain useful









Natural sharpening stone from Italy​

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Stefan Wolf​

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Published on Dec 22, 2015
It is the same type of stone Opinel branded and sell as their pocket sharpening stone - youtube.com/watch?v=fMUYuQvmM-A - just bigger "2 Medaglie", "2 medaglie di Pradalunga" or "Pietre di Pradalunga" - from Bergamo area and especially in the lower Val Seriana in Pradalunga, Lombardy Italy Around 600 to 800 JIS R6001 Japan 1973 standard - approximately 20-30 microns. Hard, dense, does not absorb a lot of water, most likely kind of shale with quartz as abrasive particles, forms very thin and barely noticeable slurry after several minutes of work with moderate to high pressure. Leaves finish similar to a soft arkansas stone but the edge feels a little bit aggressive, "toothier" It is not particularly fast stone, but the hardness allows higher pressure so the speed can be increased a little bit

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Thanks guys. I think it depends on the kind of steel. Carbon steels seem to take a better edge. Agreed that it is good for a touch up.
Sad to hear that Stefan Wolf passed away. His videos are informative.
 
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