Petrified & slightly deformed ACORN ! A rock, generic (not good at those). Elephant dropping ? Never seen one, but figured it was silly enough to be considered. also liked the idea of wood, burl ? be sure to come back soon with answer. annie
I still go with artillery shell of some sort but scratch lead wrong color for that. But massively deformed.
It looks like the doorknob to my Grandmother's very scary basement when I was a kid...and it looked that big to me when I was a kid... But they tore her house down and made it a Parking Lot for The Citadel...so I know that's not it... I got nothin'...
Here is the answer but don't open it if you want to keep guessing. http://www.meteorites.wustl.edu/id/concretions.htm
My daughter has found a couple okf what I thought was iron ore on our farm. But looking at those pics I think they maybe meteorites. OGM