Agatized bone?

[DawnC]

I picked up this curious, largish piece at an estate sale. I have no formal --or informal! -- fossil knowledge but have always collected interesting rocks and frequently have a few in my pocket. The owner had labeled this item as being from NE-central Oregon and they had mounted it with fence wire to a board. (It obviously struck them as interesting, too.) Judging from other items, the family did some elk hunting. I thought they might know bone when they saw it. Thanks for any help!

 

 

[Fossildude19]

This doesn't look like bone to me. 

Looks more like quartz or quartzite.

 

But wait for other opinions - bones are not my wheelhouse.

[Rockwood]

This looks like the kind of silicate rock that invades cracks in bedrock. The process may be responsible for the porous look. I agree that this does not look like bone. 

[FossilNerd]

I started to think this was petrified wood at first glance, but upon closer inspection, I don’t see any features that would confirm that suspicion. 
 

Like the others, I’m leaning more towards something geological. Still, if nothing else, it’s a neat piece to add to the “cool rock” shelf.  

[DawnC]

Thanks, all!