Thread: Many hours of cleaning... but what stone is this?

Hello good people,
I need your help. I got this stone and spent many hours cleaning it as it was very dirty and cover with oil like substance. However I made it to the end using many gallons kerosene.
I have started to lapping stone and this what has exposed to me. Stone is glued to wooden box permanently. I think it cant be removed from box. Stone is green color. Sometimes I think more like green-grey colors. Using DMT325 I was able to make slurry in no time. I had a hard time to remove DMT from stone when slurry was developed. It seems they two surface was glued together (DMT and stone) Surface is really smooth. To me will be about 8k+. Does any one know what stone is that? Here are the pictures.

It appears to be novoculite, a speckle pattern often means LI, but the other day I saw a stone of Bushdoctor with a similar pattern and colour of which he seems pretty sure it's a CF.

I suspect if you lap it with a finer grit to e.g. 1200+ the stone will feel finer.

What could be grit of this stone? Also when I made a slurry and seems like a mudstone. Slurry is very thick like mud.

The grit range of both CFs and LIs are pretty wide but you have decent odds to have found a fine finisher.

Looks like an Llyn Idwal to me, but could also be a Charnley Forest.

The stone posted from Piet is a Charnley Forest but is blue in colors, your is gray .

This pattern is the one which makes it hard to decide LI or CF. My $ is oh LI due to flaking.

OK,

it could be LI or CF. I don`t have any experience with natural stones at all!!! Only I have are two Chinese stones, also very different.
I think either stone (I think as I`m not expert) could be used as finisher but not polisher. So i think it will be grit 8000+.

I really would like to thank you to all good people helping me to id this stone.
I will try to flatten stone and perform 1200 grit lapping in order to get it smoother. I can tell that before i started with this stone, surface was ver, very smooth. I think this was due to use of this stone with oil, which I read on this post give more smoother edge.

Curious as to why you used Kerosene to clean the stone? as it has a large amt. of oil (paraffin) in it.

Stone was covered with some kind of oil, dark smelly. like from some machine or burn out oil from engine when I got it. I want to clean it up before lapping as was impossible to even see what was hidden under oil. pixelfixed are you saying I should not do this?