Nodules on Fossilized Bone

[Jerry W.]

What are the round nodules on this piece of fossilized bone?  

I suspect there is some lichen on the top of bone on photo 2.

These run in size from 1mm to 5mm.

 

Any ideas?

[Creek - Don]

Those are pyrite mineral.  I sometimes find marine fossils and carbonized wood covered with pyrite mineral in them. 

[Rockwood]

I see pyrite and iron rich concretions, but I seriously doubt that's bone.

[Jerry W.]

7 hours ago, Rockwood said:

I see pyrite and iron rich concretions, but I seriously doubt that's bone.

I'll cut it open this weekend and take a little look inside.

[Jerry W.]

11 hours ago, Creek - Don said:

Those are pyrite mineral.  I sometimes find marine fossils and carbonized wood covered with pyrite mineral in them. 

I appreciate the information.  

[Mark Kmiecik]

A very interesting specimen. 

[Jerry W.]

21 hours ago, Rockwood said:

I see pyrite and iron rich concretions, but I seriously doubt that's bone.

Your doubt was well founded.  Upon taking a slice out of this rock with a saw, it appears to consist of opaque black obsidian or something very similar.  That's what I get for assuming something without looking first.