what it is?

"This is very interesting stone. i have took as close as i can pictures.
i have never had time to test this but will do so soon.
it comes from England. i had more then year ago .
very heavy may be 5-7 pound range .
very old because it has been cut not with saw there is no saw marks.
Stone is a lot softer any arkansas ,turkey oil stone or charnley .f..
it is harder then eschers.
this is all i can say.

Are those photos after it's cleaned and lapped?

Devonshire oil stone ? :D

first 2 picture are face of the stone. yes it has been lapped and cleaned. side pictures are not.
it is oil stone Jimmy you are correct . if you pay attention you will see there is white color lines seems like in same distance from each other on the stone.

Oh, where does he get these wonderful toys?!