Thread: green coticule ?

Hi guys - got this one from the bay the other day - was advertised as being a coti ...
but now I see it in the flesh I am not convinced at all
the color seems to be olive-ish , a makes a lot of slurry which is also olive colored (of course) and it has no belgian blue backing
the backing looks very 'rocky' with different shades of rusty brown
it is a very fast cutter on slurry
any idea what this thing can be ?
cheers

ps: I added the creamy 'la Veinette' to compare colors...

Looks atypical for a Coticule to me, but I'm no expert

My first thought wouldn't be a Coticule

Could it be one of those "sud-ouest" stones that are now thought to hail from Italy? I recall them being more ochre with the backside being more regular.

i believe it is a pierre de sud-ouest. I thought they were French. I have two of them at home, and possibly a third, unconfirmed as of yet. I find them to be less fine than a coticule and slightly softer. Some folks in posts have said IIRC they are as low as 4k equivalent, but others IIRC being higher. I would say higher but not as fine as a coticule. I would google them and more info will come up.

Until I knew what a pierre de sud-ouest was, I had thought mine to be a lesser type of Thuringian, or a schwedenstein, the latter which is a mottled German hone.

Originally Posted by Scipio

i believe it is a pierre de sud-ouest. I thought they were French. I have two of them at home, and possibly a third, unconfirmed as of yet. I find them to be less fine than a coticule and slightly softer. Some folks in posts have said IIRC they are as low as 4k equivalent, but others IIRC being higher. I would say higher but not as fine as a coticule. I would google them and more info will come up.

Until I knew what a pierre de sud-ouest was, I had thought mine to be a lesser type of Thuringian, or a schwedenstein, the latter which is a mottled German hone.

Thanks Scipio - I think you may be right - I sent my reply (hereunder) before I read your text - I scored it on the french bay and the rock was located in the south of France near Lourdes so that makes sense - cheers

I would try the shave test and not just the hht to assess grit equivalent...I think hht can be passed with 4k and lower

thanks for the info - could it perhaps be a Thuringian ?
I lapped it and now it looks like this
tried it on a full hollow blade and it passes the hht test right of the stone - I guess the grit must be higher than my Veinette ...
included a pic how the back looks like

Originally Posted by Brontosaurus

Could it be one of those "sud-ouest" stones that are now thought to hail from Italy? I recall them being more ochre with the backside being more regular.

thank you very much for the info ... I think you are spot on!

That's no coticule.

Had the shave today
I finished restoring a 1820/1830 Sheffield (G.R.) razor (cast steel - near wedge) so I had to try it out on the 'south west rock'
this thing is a real slurry champ
thick green slurry generated via a diamond plate
set the bevel - no tape - and continued using the dilucot method
finished on running water
dried the stone and rubbed it with a hard Palmolive shaving stick
gave it an extra 30 laps (looks like shaving Parmesan cheese at the start)
shaves arm hair perfectly - HHT 3
50 strokes on linen and 80 on leather brings it up to HHT 4
the shave proved OK - sharp but a bit mellow and felt quite dull on the skin
imo no match for the 'la veinette' coticule
since I have never used this razor b4 I'll give it a try later on my other razors I have in my rotation

ps - thanks for all the feedback and info I received from you guys - there's so many things I am unaware of...I'd never
imagined what this rock might be