Why this rock is probably not a meteorite:

It's hard to tell from the photo, but this thing is made of metal - it conducts electricity.

The finder said that he had it analyzed and it contains 65% manganese and 35% iron. No "iron" meteorite contains 65% manganese. All irons contain <1% manganese.
What is it?

Something man made.

Note added later: Carl in Tucson suggested that both this one and no. 274 were "Tombstone Manganese Silver Ore."


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.