Why this rock is probably not a meteorite:

This rock clearly has a crust, but it's thick, reddish, and lumpy. If you look close, there are square shapes in the crust. A meteorite, even a iron meteorite, will be smoother than this on the surface, and there won't be any squares.
What is it?

This appears to be a cluster of pyrite crystals like number 76. The outside is rusty because the iron sulfide has oxidized to iron oxide.


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.