Interesting piece of wood

[azz22]

 

[azz22]

Anyone know what it is and best way to clean it up and finish it??

 

[Windows]

Possibly a gall of some kind? Is it oak?

 

[Orraloon]

Chuck it on the lathe and it should make something really nice.
Regards
John

 

[Qwercus]

Anyone know what it is and best way to clean it up and finish it??

Looks like when two branches rub against each other for years without fusing together, it's certainly an extreme example of this though.
Hard to identify the species.