Why this rock is probably not a meteorite:

This is a piece of a rock that that was several inches in diameter. It has a glassy, smooth exterior, but the rind is much too thick for a meteorite fusion crust. A meteor moves through the atmosphere so fast that the molten material that forms on the exterior sloughs off as soon as it forms. 
What is it?

We don't know what this is. It appears to be a thick glass coating on a rock. It might not be of natural origin. 

Note added later: A viewer identified this as goethite or limonite, both forms of 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.