Why this rock is probably not a meteorite:

The finder found this rock on his deck in Buffalo, NY. There was a hole in his vinyl siding. It has what could be a fusion crust. We see no reason to rule out a meteorite.
What is it?

It appears to be a piece broken from a rock, so it would have to be a fragment of a meteorite.

Note added later: We analyzed a piece of this rock. It has a chemical composition that's inconsistent with any kind of meteorite (e.g., it's 40% calcium as CaO). We still don't know what it is, however.


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.