possible cannon ball? or dinosuar egg? what is it?

[BarnYardJams]

It definately appears to be made of rock like substance not metal and has an outter layer to it with a darker gray inner stone like layer it is about 5 or 6 inches in diameter

 

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[Carolina Tom]

Fossilized coral?

 

[olroy70]

where did you find it.....

 

[bologna321]

https://en.wikipedia.org/wiki/Concretion

 

[Loco-Digger]

Petrified dung maybe