just picked up an unknown green smooth as glass stone........has been used with oil and cannot get a slurry going when using my synthetic Japanese slurry stone....lapping nothing am very inexperienced and have only used oilstones/arkansas over the years BUT what I have seen with coticles is awesome; till I can purchase a coticle could this green stone be repaired to go back from oil to water?..it is a lovely stone and have tried to post pics BUT just can't seem to get them to download here.........thanks in advance for any advice to an ignoramus,
Lou
end before lapping <brown>


end after lapping..now grey/green like rest

hi - difficult to say without pics or seeing it. I could only suggest that the slurry stone I would use would be a coticle or BBW stone as they are none porous

I had a coticule that someone had used oil on - a few mins with the appropriate slurry stone cut through any residue

Have you anything you could lap the stone with?

and cannot get downsized images to download here!

Lou

have a 200 grit diamond pad for chisels; about 4x6 inches; wondering if I could hurt it further with this?.........thanks

garyhaywood:

i think it would be ok, have you got any wet and dry san paper i use 400 to 600 grit, ihave read correct that its a gren coticule, sounds like it maybe a la verte?

i personaly use my dmt325, but wet and dry sand paper is perfect

Hi Lou.Sink the stone for a day or more in a liter of methyl alcohol.Then you have to apply a good lapping on a diamond plate or on a wet sandpaper 320 gr on a well flat surface as Gary advised.
You can produse slurry with a coticule slurry stone or a small diamond plate or a synthetic nagura or a sand paper stuck on a small metal block.
Best regards
Emmanuel

Gary; I don't think it is a coticule have been trying to post pictures but with out success; maybe I could email them to you to post here as am afraid this 60 + year old is lacking in computer knowledge for posting pictures of "Green Stone".............

Lou

You could try a regular kitchen cleaner with a degreaser like Mr Muscle etc, that what I have used in the past, failing that if you are sure it a natural stone, pop it through the dishwasher on a quick wash setting if you have one

All that said, a good lapping with a diamond plate and hot soapy water works wonders too

Best regards
Ralfson (Dr)

much better after using the 200 grit pad that is now worn smooth + lots of hot water + detergent <thanks all> can get a slurry going at least and some good steel particle removal; used the slurry formed with the diamond pad and it turned from a whitish color to a dark grey while using the stone ............when I figure out how to download pictures here will post them to try to get an identification........Lou

peribeca:

Gary; I don't think it is a coticule have been trying to post pictures but with out success; maybe I could email them to you to post here as am afraid this 60 + year old is lacking in computer knowledge for posting pictures of "Green Stone".............

post apicture to my email gary.haywood4@btinternet.com side veiw and bottom , top

Lou

Gary; am sending them to you cc to Bart..thanks for the help.......cheers;
Lou

I have to say i realy don't infact i would say that is not a oticule, looks like a thury or somthing else natural?

gary

Gary; yes, it is Natural; see the pix of the ends before lapping was a dark brown and after lapping it turned grey green

Lou

Alex can you send pictures to me please? I advised to sink the stone in the methyl alcohol but you didnt reply.
Best regards
Emmanuel

peribeca:

Gary; yes, it is Natural; see the pix of the ends before lapping was a dark brown and after lapping it turned grey green

Lou

could be a escher or thury