Why this rock is probably not a meteorite:

These two rocks were sent by a person who found them in Utah. Neither has a fusion crust or regmaglypts. Both are angular, with no smooth sides.

The rock at the top has a high specific gravity, 5.1. It does not contain metal, but is nevertheless so magnetic that it will pick up a small magnet. It has a metallic luster and gives a gray streak. It also consists of elongated crystals. Together, these properties are not consistent with any kind of meteorite.

The rock at the bottom also has a high specific gravity, 4.8. It does not contain metal and is not magnetic. It has a metallic luster and gives a red streak. Again, these properties together are not consistent with any kind of meteorite.
  
What are they?

All of the properties of the top rock point to a rock composed dominantly of magnetite. All of the properties of the rock at the bottom are consistent with specular hematite.
  


These are two different rocks.



www.catchafallingstar.com
www.catchafallingstar.com


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.

e-mailkorotev@wustl.edu