Why this rock is probably not a meteorite:

It's vesicular. Although there's a glassy coating, the object appears to be glassy throughout. The glass of a meteorite fusion crust is very thin.
What is it?

A cinder or piece of slag?  


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.