Another new stone, please id

Hello again, RAD and HAD is hitting hard. I bought this stone on Ebay with a lot of razors.The seller claims washis grandfather who was a barber. I have no experience with this kind of stones, I had couple coticule and couple thuringians,but nothing like this. It was hard to lap, not like a CF but harder than coticule,and was to begin with almost flat.it raise slurry, whithe slurry , but you need 45 sec to 1 min with a DMT 320, to raise a normal amount of slurry.I test a razor and the slurry became darker after 10 half strokes,also you can hear the abrasion sound very clearly.I can't say right now if is aa finisher bur the razor I tested was sharp enough to pass HHT.The dimensions are
5 inch long on longest part, and 4 inch long on short part, 3 1/2 wide, and 7/8 thick. The smell is like earth smell.What this can be?

Looks like a big slab of coticule to me. Some of them are harder than others. One of mine smells sweet and the others have no scent at all.

It could also be some sort of Jnat, but I've never handled one. Wait and see what other folks think.

It is likely to be a Coticule despite it being hard.

Thats exactly how my coticule looked when I got it. Pretty sure thats what you've got there. :)

Thank you gents, so a coticule without BBW and without slate on the back? I did not know they came like this.I will treat her like a coticule to see what happened.

I see signs of layering there. I'm not so sure about it being a coticule of course I've never seen one that was unweathered and in the rough.

I would guess a Les Lat, they are quite fast with slurry and have a distinctive chalky response when honing.
If you have the tools to lap the bottom it might be a "hybrid" layer which is very useful as a finisher.
Don't try using your DMT 325 for lapping the bottom though, it will take forever and your 325 might be an 8k when you are finished... :)

It looks like a big chunk of Vintage, rustic Coticule. Jarod at the superior shave has one on his site, similar:
Belgian Coticule Hones He has tons of photos, it's at the bottom of the page.
I don't think yours is Les Lat, it doesn't look like any I've ever seen. Drop Jarod an email with some pics, or Maurice at the quarry, they should be able to id it for you....

I did get across cotis which were very hard, not backed with anything. However all of them were more right angled.

In the third picture down is there writing on the lower right of the stone or am I just seeing things? Vo--something?

My vote is for "unknown, not coticule" but I'm interested to see what we find out!

There is no writing on the stone. I will do a dulicot tonight and post the impressions.
regards

To tell you the truth just looking at that edge where you can see an unweathered part that really looks an awful lot to me like solid garnet. Not the whole piece just in the 5th photo those 3 areas.

Unbacked vintage Coticules are not that rare, I had 6 of them out of about 18 vintage Coticules I bought. They're all backed now with slate I cut from a tile. I think the 'layering' you see are just different angles in the sides.

Is the shininess of the unlapped sides just the patina of use, or could someone have varnished them?

Send some of the slurry to Holli4pirating. He'll be able to tell from the taste.

Is a coticule. I did dilucot on two razors , last night and is a coticule. It a fast on slurry and bring an very nice edge on water only. Water start to have black steel swarf after 10 -15 strokes, but not autoslurry.I get HHT2-3 on both razors, and 4 after stropping. So treat it like a coticule and is a coticule. What are your toughts, live it in this condition, or round the sides?You think the opposite side may be a hybrid?
Regards

I lapped the other side and in the middle,is something like marble, and it can't be lapped flat. Is like some inclusion in the stone,and is like in layers.

My guess is a nakayama, it is a sedimentary stone and look a lot like a coticule on the sides except the sedimentary layers are a little thicker than than the coticule and it also has the the rusty veins like your stone. I have a stone that use it in progression with a coticule. As a finisher right after my thurigan . It finishes about 16-18K. I was looking a nakayama stones the other day and most of them are very similar to yours and usually irregular and real rough on one side and are a little more grey than yellow. I am retired and have been collecting stone and straight razors for 10 years. I am just starting to identify the stones and one of the first Things I do is determine the approximate grit of the stone I an trying to identify. while my stone looked and acted like a coticule, it was a lot finer stone than my coticles.

Thank you. I think you are right, it may be a Japanese nakayama. I never had one, nor see one, this one I rub it with a softer coticule, make slurry ,perform a Dilucot, and finish on water only. I get constant HHT from the stone, and is not the case on coticule, just ocasionally I got a HHt before stropping.I am pretty sure , if is not a japanese, is a very hard coticule, even to raise slurry from the stone is very hard, with a DMt 320.
So what kind of Nakayama you think it is? is , for sure a finishing stone, as I bought it from a barber, the seller said, and is very hard.
Thank you for your input.
regards
livio

Definitely not Nakayama i am pretty sure it is coticule specially from that last picture

I might of lead you done the wrong road, maxim207 says defiantly not. The stone I have also makes a sandy sound when honing and sucks up water like crazy, unlike the coticule. Our stones may not be the same, but the characteristics are similar . It has a velvet like feel and is finer than my Thurigian by at least 3 or 4K. I look at my razors under a 40 power microscope, between stones. I don't know how fine Coticules get but what I have read about 10K without a slurry. What I know and a buck will get you a cup of coffee