Why this rock is probably not a meteorite:

This might be a meteorite in that it contains tiny blebs of metal and it has a coating that might be a fusion crust with flow marks (see lunar meteorite NWA 482).

The problems are (1) the interior is glassy, not crystalline as in nearly all meteorites and (2) and the glass contains many small vesicles. This thing was once molten. Meteorites don't have vesicles like this because, with very few exceptions, meteorites were never molten. Those that were molten usually cooled so slowly that the gas bubbles escaped and crystals formed, not glass.
  
What is it?

Probably a piece of slag. The "crust" is fast-cooled scum that formed on the surface of molten material.

It would be good to get a chemical analysis on this one.
     



www.catchafallingstar.com
www.catchafallingstar.com


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.

e-mailkorotev@wustl.edu