Why this rock is probably not a meteorite:

This is a fragment of meteorite, another ordinary chondrite.

OK, there is no smooth surface or fusion crust on this small fragment. But, meteorites break apart. The inside (sawn face, bottom photo) has finely disseminated metal grains, as is typical of an H chondrite.
What is it?

The person who sent this sample bought a large stone (3 kg) from a dealer who sells meteorites that have been found in the Sahara Desert. Most of these "Northwest Africa" (NWA) meteorites - and all the inexpensive ones - are really fragments of meteorites that have broken apart, in part from weathering. Most have been sitting out in the desert for thousands years.


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.