Thread: Help needed to identify hone

I don't have a stone that is hard enough to get this stone to slurry. I have tried my Chinese water stone, welsh slate and ceramic stones all have the same result, with the slurry all coming from the slurry stone and not from the brown stone. So I've used the same wet and dry paper I used to lap the stone. As you can see the slurry is chocolate brown colour. I don't think the stone has dirty oil on it as wiped it with a strong degreaser and nothing came off. In fact I don't think the stone is absorbing water or oil, every thing just wipes off the surface. Ill add the picture with slurry shortly. The stone seems to be heavy for its size so must be dense.