Why this rock is probably not a meteorite:

This thing looks metallic, but it doesn't have the rounded, aerodynamic shape of an iron meteorite. Also, it's crystalline. An iron meteorite never looks crystalline, unless it's been chemically treated to show the Widmanstätten pattern.
What is it?

This is probably a mass of some sulfide mineral, possibly pyrite.

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.