Help with ID of this rock?

[Parker]

There is no doubt that this rock is a geological artifact, but I just wanted to check to make sure that its not a Native American artifact of some kind.

After looking at some of the stuff on Ebay, it sure looks like this would be something before some of those other 'rocks' are.

This rock was found by my great-great grandmother pre-1900 and was passed down to me by my grandfather about a month before he died in 1995.

The inside hole is just about as big as a golf ball. There are no burn marks on it, or anything like that. I would guess that it was found in either Indiana or Oklahoma.

It currently (and will for a long time) holds my first homerun baseball that I ever hit.

Any suggestions? I've come to this site to find the pros, a suggestion from another site.

Thank you!

Parker

 

[Andy can]

Partly a guess on my part, but it looks like it could be a mortar for crushing herbs in. You just need a pestle now.

 

[d-2]

Could it be, perchance, the rock that was held in the left hand while someone was useing a "bow drill"? After lots of use they rock would wear away and left that neat hole. Other that that I have no idea but I bet someone comes up with the right answer. It could be a mortar also, though I have never seen one that small...d-2

 

[minelab marcus]

It looks like the perfect size to hold in your hand and use as a block for a "bow-drill" for starting fires and such.
HH
MM

 

[allhuntedout]

similar to other Indian tools I've handled/seen. I do not think it is a naturally formed this way. I think it's definitely a keeper.