Yeah it’s stone

[lovinlife]

It’s spring in here in montana ranchers plowing up the field and found two stone balls? Heavy round stone ball. Any idea? Central montana lots of Native American artifacts and Dino bones in the area. Just don’t know what these are?

 

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[old digger]

I really cannot tell from your photo's, but, does it look like the stone is composed of a Granite material?

 

[mcmich]

Did some googling and guess where I ended up:

http://www.treasurenet.com/forums/what/358886-stone-cannon-ball.html

Looks plausible (that's a link above)

looks like a game ball

 

[lovinlife]

Really. I also saw maybe Native American game balls?

 

[lovinlife]

Would you need a closer pic? It’s wet from washing off dirt, and there are some scrapes from the plow.

 

[TheCannonballGuy]

One of the photos shows the ball is out-of-round (unlike, say, the "perfect roundness" of a bowling ball), I think your round-ish stone find may be a Geode.
https://geology.com/articles/geodes/

 

[sutphin]

NEET FIND

 

[lovinlife]

That would suck if I opened it and it wasn’t a geode? But so cool if it was.

 

[Daryn]

The did use stone balls in certain types of mining. The balls were of varying sizes from mini ball size up to cannon ball size. There was a post earlier this year either here or on a news feed that gave the history of them.

 

[Eu_citzen]

Rocks can also weather into that shape naturally. Refer to "Spheroidal weathering".

 

[Plug N Play]

They look like Moqui Balls from Utah.