I got more rocks

and I need your help. Beside one stone I do not know much about two others. I know that yellow hone is a Rozsutec stone. All hones are presented as:
1.dry
2.wet.
3.slurry.

All stones are soft and slurry was created in short time with few passes on DMT325. Stone one has white slurry when is dry and is super smooth, stone two has pink/brown slurry and is little coarse, and Rozsutec is on one side coarse and other smooth (done on 3000 grit water paper). I have read that this stone can have two side and different. It`s like stone "learn"the grit.

Stone one:
Attachment 118253Attachment 118254Attachment 118255Attachment 118256Attachment 118257

Stone two:
Attachment 118258Attachment 118259Attachment 118260Attachment 118261

Stone 3
Attachment 118262Attachment 118263Attachment 118264Attachment 118265Attachment 118266Attachment 118267Attachment 118268

Maybe later I will hone one razor with each stone and try to guess grit but for now I am puzzled.

Interesting, that last one looks a bit like a stone I received from South Africa as a test run but the rocks weren't plentyful enough to continue the search. IIRC it was a pre-polisher in the 6K range, a hard stone.

Hmm doesn't really look like the standard Rozsutec. I think you have to special order them to get them in a non standard size. They're also really hard, not easy to slurry.

Attachment 118301

Piet

in this case yellow stone is not Rozsutec because is not like yours on the picture and is soft like sugar. This stone melts under DMT325. However I have prepared one side on water sandpaper 400 grit, other 1200 grit and they hold this grit. Now I`m even more puzzled. Now I have another 3 hones and no idea what I got. Does grey stone could be some slate, maybe Thuri or similar? It is extra fine grit, very smooth surface.

Stone 1) maybe a dark Thury. Lets see a pic of the sides/ends

Stone 3) my best guess would be "pretty"

Well,

in fact stone 3 is really pretty but when I will have some more time I will check it honing performance. I will post some microscope pictures fro reference. Also I will try to upload sides pictures of stone#1. BTW why sides/ends pictures?

Quote:

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Originally Posted by Magpie

Stone 1) maybe a dark Thury. Lets see a pic of the sides/ends

Stone 3) my best guess would be "pretty"

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Here my guess, stone one thuringian, stone two BBW, stone three I don't know, but maybe could be a coticule with blue layer contamination.

This are side and front pictures:
Attachment 118348Attachment 118349Attachment 118350Attachment 118351Attachment 118352

Here is microscope picture (not the best one)
Attachment 118353

Small update,

after performed lapping of stone one I have notices small cranny of (what I think is) copper. You might notice this on some of the pictures. I try hone razor over this cranny and I can tell that in some point edge of the razor is hitting something different than stone itself. Funny thing is that this was not present before I start lapping. After I have removed stone surface this cranny come to picture. I guess I still have some stone left to be used of flip stone and execute lapping of other side:-)

My guess would be Slate, ragstone, slate

Well,

after few testing (I am not sure if this is right) I think hone one is something close to Thuringian, just darker. I honed and test one of my razor using hone #1 as finisher and it was very nice. Much better than my C12k and little better then my LI on oil. Now I will test other hones. Beside that there is more rock comings and more testing ahead of me. I guess at the end I will be just naming them UKNW#1, UKNW#2 and mark possibly closes grit and use it:-). Thank you all for your help!

The copper looking inclusions might be pyrite. Pyrite is not uncommon in slates.

robellison01,

well I read about pyrite on wiki and you might be 100%. it looks like it is pyrite. This also means I can go over pyrite with my edge as it might be damaged.

Does stone #2 sparkle? It reminds me of the stone in this thread -- http://straightrazorpalace.com/hones...recognize.html. I've decided that one is just a basic dark slate with a bunch of sparkly mica. Polishes nice, though.

Quote:

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Originally Posted by proximus26

robellison01,

well I read about pyrite on wiki and you might be 100%. it looks like it is pyrite. This also means I can go over pyrite with my edge as it might be damaged.

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Pyrite inclusions are bad news if left in place. I have one hone with them, they are hard and will damage an edge. I have read (but haven't had a chance to try myself) that you can dig them out, or drill them out, and then use the hone. That would probably be fine if there are just a couple here and there, but if they are wide spread the hone may not be suitable for razors.

robellison01.

pyrite was not visible at first, then show up during lapping. I guess if I hone little bit on side of the hone I could determinated how far it goes and then decide either avoid this side or cut the stone. If its only few mm into stone stone surface I could flip stone and lap othe side or I could lap stone again in order to remove pyrite.

It's certainly worth a try!