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.

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 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

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!

Originally Posted by Scipio

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

ok didn't know that ... Ill give it a try tonight - cheers

Doesn't remind me much of a Thuringian either in all honesty

I agree about the HHT.

I can pass the HHT coming off the Naniwa 1K, so there's that
The HHT is open for interpretation, it's a valuable tool and I use it a lot but there's a lot of different characteristics in the HHT that I need to judge in my different honing stages

Every one of my hones pass the HHT: 1k, 5k, BBW and Coticule, they need different interpretation coming off each one + after a good stropping

Shaving a bit of arm hair usually tells me much more about how the edge feels than a HHT
Also I use toilet paper to wipe down razors during honing, when I fold a piece over a couple of times and draw my edge through the paper I can also tell and feel how rough or smooth my edge is


TL;DR: The HHT is nice, but after a bevel is set EVERY hone I use passes the HHT even the 1K. If you wanna know the real value / grit of your stone, do a regular honing and finish on your stone (if you like add a layer of tape to create a secondary bevel for finishing to ensure a 'pure' finish from the stone)