Why this rock is probably not a meteorite:

1) We are unaware of any meteorite that has a high-contrast interior with this type of texture.  

2) On some meteorites, portions of the exterior may be broken and rough.  The concave-outward portions, however, should be smoothed from ablation during atmospheric entry.  The exterior of this rock is not smooth, as we'd expect for a meteorite.
What is it?

Like no. 17, it looks like an amygdaloidal basalt with calcite, quartz, or some other secondary minerals now filling the voids.


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.