Why this rock is probably not a meteorite:

The finder thought that this might be a meteorite because of the glassy crust. It's hard to tell how big this rock is, but it appears that the crust is several millimeters thick. That's thicker than a meteorite fusion crust. Also, this rocks has vesicles, and meteorites don't have vesicles.
What is it?

When a volcano erupts and lava flows onto the surface, the exposed surface of the magma is the first thing to cool. This often leaves a glassy crust. This is almost certainly a terrestrial volcanic rock.


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.