Why this rock is probably not a meteorite:

1) This rock contains metallic iron (the shiny areas) and is magnetic, as do many ordinary chondrites. However, we analyzed the metal and it contains only a very low concentration of nickel, <1%. Metal in meteorites has 5% or more nickel.

2) The rock contains vesicles and meteorites don't have vesicles.
What is it?

This is a piece of slag. The presence of vesicles means that this "rock" was once molten and that gas bubbles were trapped inside. With very few exceptions, asteroidal meteorites were never molten.


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.