KMc

Thanks for you helpful comments! Mystery solved!

I found this rusty looking rock in WI recently. It is heavy and is magnetic. It looks like it may have some small flecks of metal in it. I wanted to make a small window in it with a dremel or other drill to see. Wondering if this could be an iron stone meterorite or if it is some kind of geode? I'd welcome any advice. Thanks much! K