Stone Tomahawk/Axe Found on our Farm 10 x 9.5" $?

[lashes_s]

Hello Everyone,
My great grandfather found this stone Native American axe/tomahawk this on his farmland in Mundare Alberta (info on Mundare)
info on Mundare
I've looked online and haven't seen anything quite like it - was hoping that some artifact experts such as yourselves could help my grandfather and I out - could you confirm what it is and my grandfather also wants to know how much something like this is worth.
Any help + insight on this would be greatly appreciated!
At it's widest point it is 10" and at it's longest length it is 9.5"
Thank you kindly! Images are below


side view




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[chase]

:welcome: Welcome to AH.com :welcome:
lashes_s, I am sorry to be the first one to tell you what you have is a natural rock. This is not an artifact. They tend to be called "Geofacts"

[jaker]

sorry i have to agree its just a rock

[eagle eye]

I agree. Natural rock formation. Its a cool rock though.

[rmartin]

Welcome from central Illinois. These Guys have it correct. Sorry to say I agree this is entirely natural.

[CoachG]

Agreed.  Natural rock formation.  Welcome from Tennessee.

[JR]

geofact 4 sure, still cool yard art stone though.