I got this from a member here as a gift, but I know nothing about it (and neither did he).
Could anyone possible tell me what it might could be (besides a razor hone)?
Thanks.
Dimensions? Can it come out of the box? If so, pics of sides and bottom.
Those preen boxes are pretty common for thuri's, but the stones typically were 4.5-5x1".
6"x1.5 (what yours looks like to me) weren't unheard of but much rarer. The light scratches on top are consistent with what a thuri would show, but there are also mid-high grit vintage synthetics that show similar scratches.
Best guess from the pictures and nothing else, there's a good chance it's a thuri, but I wouldn't bet on it. Could easily be a cleaned up vintage oilstone as well.
I tried to lap one side & one end as it used to be glued into the box, but I guess the glue wore out over time.
And while we're here, I was looking at a Norton stone, but the seller had no idea as to the grit. It's supposed to be a combo stone. Perhaps you can help with it as well?
Pretty sure that's a thuringian. Not 100%, but pretty close. Nice score. It's definitely natural, definitely whetstone, and every sign indicates Thuri. If I were bidding for it on eBay, I'd bid Thuri prices, I'm that confident in the ID.
The norton is just an old norton combo. Probably med/fine or something like that. Maybe 600/1000 or around there. Not really sure, but nothing you'd use with a razor unless you really wanted to bevel on it for some reason. It's not a Norton axestone if that's what you were hoping.
Combo stone looks like a coarse/fine India. For chips & used with oil. What about the dimensions on the other stone? Does it smell musty, like it was used with oil? The peripheral staining looks like oil use to me, or was that quickly evaporating water that you applied in lapping? Some sort of shale perhaps.
When I was lapping it, I was using it on some wet/dry paper that I was using to lap a Naniwa SS1000 with. Perhaps that is what you see.
The dimensions that I previously failed to list are 4 3/8L x 1 3/16 x 1/2". Sorry...never learned the metric system.
My nose don't work too good, but the wife said it smelled like an old pair of shoes...not like oil.
The shade differences are just the way the light reflects off the part that was in contact with paper while lapping (a disorganized scratch pattern) vs the stone that is polished down by use (didn't contact the paper).
So, if it's a Thurnigan, that's a good thing, yes? I also got a Franz Swaty off the bay for 99 cents (no free shipping). Are both of these stones "touch-up" stones? Used with water, I assume?
Touch-up stones: Thuringian, if that, maybe, and Swaty, yes again maybe; combo Norton India, best left for chipped edges and garden tools. What's wrong with bottom-feeder stones anyway? Why the obsession with finishers? Seeing that the black stone in question leaves a trace in the box, it looks like it was forcibly ripped from its housing, rather than the glue failing. My guess is that the ultimate identification there will be linked to the hinge/box system, and possibly the herringbone marks on the side(s) of the stone.
I've no obsession with finishers, but i'm not one to turn down a freebie or pay 99 cents for a decent stone either.
I'm just curious as to what they are since i'm a noob.
The clasp on the box definitely resembles ones from known thuringian hones. Let us know how it performs. Describe the smell of the stone when slurry is made as well as the feeling it produces on just water.
Nice stone - should clean up well.
Definitely a slate, and - as Ian has said - most probably a Thuri.
The latch and hinge are reminiscent of some of the Thuri/Escher boxes I've owned.
Slurry on a Thuri isn't entirely necessary - just get it flat, chamfer the sides. Splash a little water on it and you'll be in business.