Why these rocks are not meteorites:

These two rock samples (slices) were each sent to me by a different and experienced meteorite dealer who each purchased the respective rock from dealers in northern Africa. In both cases the rocks were sold as lunar meteorites, as I understand it.

The top sample, which is about a centimeter long, is a bit suspicious because the clasts are too circular for an impact breccia. Also, I've never seen a clast with a red center in a lunar meteorite.

The bottom sample looks pretty good. It resembles NEA 001 and also some eucrites.

We analyzed both samples. Both had less than 100 ppm chromium, a simple feature that is inconsistent with any kind of meteorite.
  
What are they?

They're both terrestrial rocks, probably sedimentary rocks, judging by the high concentrations of zinc, arsenic, and antimony.
  




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