Can anyone tell me what this is or might be?

[Leaverite]

Originally Posted by lillyput

But I like the hand ax idea. That is thinking outside of the box

Yeah, I readily admit it, I'm apt to do that, lillyput.
Was simply the musing of an old fool.
Climbing back in the box, here's one of which I can speak.

An Acheulean hand-axe with 30,000 - 50,000 years of heavy patination and weathering. (from Southern France)
The flint peeks through in only 3 places.

[NeoGeo]

Originally Posted by joshuaream

It looks like a tab of flint that formed inside a chalk/limestone rock.

I think ya nailed it...Looks like a flint Nod. that has no true cortex...Interesting piece...