Thread: I Found It Over There

Yeah, mine is also regular, I just measured all the dimensions to .001" with a digital caliper and calculated volume, if anything the volume will be a little bit less than calculated, with the stone having some rougher surfaces compared to the polished side. So mine might actually be a tiny bit higher than I calculated, but not a significant enough amount to worry about. I also don't know how accurate my scale is. I have a different very accurate scale that I trust but it only measures up to 8 oz.

I think the volume is more accurately measured with water displacement.

Yes it most surely is, but without a burette you won't be making accurate measurements that way either. When a stone is regular (square and parallel) and able to be measured to a reasonably fine resolution (for instance with a caliper or micrometer to .001") you can get pretty darn close, probably within a significant digit or so.

Well I think we have sufficiently high jacked the found it over there thread so I would say let's move this discussion to the monstrous arkansas thread

Just found something local :-) As mentioned before we here (Germany / Odenwald) mostly talk about a region where the metamophoric rocks are granulite facies. The Stones i found are in my sense (from their desription in literature and comparing other examples on the web --> Granulite

The Granulite (Latin granulum, stands for "a little grain") is a more or less fine grained metamorphic rock, where the main component is quartz and some blackbarry colored garnets.....more on Wikipedia...

Granulite - Wikipedia, the free encyclopedia

Beeing that the general Wiki defintion, the stones i have found are further more described in older german literature. so these species of Granulite have a common declaration which is (20-40% Quartz, 40-60% Feldspah and up to 20% garnets)....

so thats how these stones look like, just to have a common understanding, the working area here is around 8-4cm...you can see the fine grained structure with the quartz particles and certain smaler darker inclusions which will be better visible in a higher magnification.

The first lapping was done with a DMT 200, followed by sanding paper up to 600...you shurely can feel the pain not owning the gear like a "Diamond Saw" or a "flattening table", so it really took me about 2 hours to get that one flat

wet:



dry:




So knowing here are some smart guy geologist posting, the identification is just a first guess from me personally based on "knowing" the geological backround in my region and on available information on the metamophoric rocks.

up do date I dont want to post too much information until i really did more research on the perfomance of these stones and sent some proper samples to some friends. What i experienced is, that after a certain progression up to a 8K synth or natural the bevel can be further polished, i only used oil on the stone....
this still has nothing to say about shaving or honing qualities. And everybody doing so and finding some stones knows that there will be more work to do, i mean in this case get more samples and try different areas where the stones can be found.....

That is an interesting looking stone. From the picture it looks to be coarsely textured, but I think this is not so if it will refine an 8k edge.

I have sent a couple of the stones I found out for guys to test out also, I hope to have some feedback before too long on what they think. I have found that the stone gets my razor shaving sharp but I'm not yet sure if it will be smooth enough of an edge just straight from the stone to hanging leather. I have shaved with an edge from the stone twice now, but I had a little irritation that hadn't healed yet from a subpar edge on a different razor, so I have only been shaving WTG which it handles easily. The true test for me is ATG.

I was looking at those on your page, but you had not written anything about them yet. I have seen similar structure in metamorphic rock here. The ones I have tried here are far too slow to be good hones but they are certainly nice looking. It sounds like you have found some that look cool and work well, a win win. I wish for a flattening table also. One would be very handy!

Sebastian,

would you have seen anything in old German literature about hones from the Vulkaneifel, Trier area, Mosel or Saarland? I have spotted a few interesting veins while driving around in the last weeks but I didn't pick anything yet.

Originally Posted by MichaelP

Sebastian,

would you have seen anything in old German literature about hones from the Vulkaneifel, Trier area, Mosel or Saarland? I have spotted a few interesting veins while driving around in the last weeks but I didn't pick anything yet.

As far as i read there was a use of grinding wheels which were transportet from the Eifel to Solingen...these wheels were used from Solingen companies...

http://books.google.de/books?id=srI6...ed=0CEYQ6AEwBg

Concerning sharpening stones there are sources writing about stones of Sandstones of different types like Color-Sandstone, it also seems that slate was quarried...sorry only in german ;-)

"Diese Konglomerate enthalten Geschiebe von Quarzfels und Thonschiefer-Stücke, welche durch einen an Thon reichern, rothen Sandstein verbunden sind. Im Allgemeinen ist aber der bunte Sandstein von mittelmässig feinem Korne, und er besitzt hinlängliche Festigkeit und Härte, um einen dauerhaften Baustein und zuweilen auch um gute Schleifsteine zu liefern. Nur die obersten Schichten werden feinkörniger und weicher und nehmen alsdann, wie zu Lorich, eine Stunde westlich von Trier, eine blassrothe und selbst eine weisse, selten eine gelbe Farbe an, während die mittler n und untern Schichten durch Eisenoxid mehr oder weniger tief roth gefärbt sind."

http://books.google.de/books?id=ZapA...ed=0CCUQ6AEwAA

http://books.google.de/books?id=_khA...ed=0CCsQ6AEwAQ

http://books.google.de/books?id=aSha...ed=0CEsQ6AEwBg

Sorry not to bring up any more details, but i will have this region in my focus on further researches :-)

Sebastian,

that is excellent, thanks! Lorich is about 20 minutes from home, so I could go and look around for an old quarry! I'm also planning on checking the quarry in Hockweiler... I see it every time I walk my dogs. There's also the slate mine/quarry in Fell and the many rock outcroppings in the area... just two hills away from home. I think I also know where to get red sandstone samples not too far away from Fell... one never knows

In "Geognostische Beschreibung der Eifel", there's a mention of Uerzig (now Urzig)... I spotted many interesting looking stones while driving through that area. I pass through Igel and Mesenich every day but I do believe the area has been overquarried already. It may still be worth checking. Kill bei Cordel could be Kylltal just outside Kordel, Sirk could be Sierck (now in France), Rahlingen would be Ralingen. I may actually need to print parts of that book as most of those places do sound very familiar. Some bits on pages 118-120 were too complicated for my limited German, but that gave me a round picture of the next hike destinations

In "Katalog für die Sammlung der Bergwerks- und Steinbruchs- Produkte Preussens", Bollendorf is also not too far and I seem to recall piles of stones just across the river from it... and it's a bit upstream from Ralingen in the previous book.

That should keep me busy for weeks/months

Regards,
Michael