Why this rock is probably not a meteorite:

1) This rock has a smooth exterior (left), but it's not really a crust. No crust is visible on the sawn face (left).

2) In the sawn face, there are a lot of holes, and many of them are aligned. Meteorites don't have holes.

3) The rock is dense, it will lift a small magnet, and it has a gray streak. Up close there are some shiny things, but they're not metal; they appear to be yellowish sulfide minerals.

4) The rock is very fine-grained and there are no mineral grains that appear to be silicate minerals evident on the sawn face.
What is it?

The rock consists mainly of the mineral magnetite. We don't know whether it is natural or man-made. There are solidified magnetite lavas on Earth, and it's possible the rock is one of those. It was found in east central New Mexico.


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.