Why this rock is probably not a meteorite:

This one is great. The rock on the left is a meteorite from my collection, Gao-Guenie, an ordinary chondrite. It has a nearly complete fusion crust. The rock on the right was found in Indiana. It has some kind of crust that strongly resembles a meteorite fusion crust. It can't be a desert varnish (Indiana!). The light-colored interior is coarse grained, with quartz, feldspar, and some dark, presumably iron-bearing mineral.
What is it?

The Indiana rock is a granite or some closely related rock. It was probably dropped in Indiana by a glacier. I have no idea how the dark crust formed.  


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.