Why this rock is probably not a meteorite:

This "rock" (about 2" across) has both big and little blebs of metal (the shiny or gray areas) and lots of vesicles. In metal-bearing stony meteorites (ordinary chondrites), the metal grains ar all about the same size.

Also, the finder of this rock followed my advice and had a chemical analysis done. The "rock" has a composition that is not only inconsistent with a meteorite but suspicious even for a natural rock from Earth (e.g., 33% Fe2O3, 6% MnO, 0.15% MgO, 30 ppm Ni).
What is it?

A 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.