Why this rock is probably not a meteorite:

This thing was found in a river in Idaho. It's solid iron, the finder said.

Iron meteorites typically have bizarre shapes, but they're not this spheroidal.
What is it?

Probably some man-made object. A cannonball?

Note added later: The finder did some research and concluded that this is a Ni-Hard grinding ball (Google it!).


Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.