Why this rock is probably not a meteorite:

This is an ugly one.  It does have some kind of a coating that resembles a fusion crust.  The finder thought that it was a lunar meteorite.  It bears some resemblance, although we have not seen large white clasts with stained exteriors in lunar meteorites.  We analyzed the rock and found it to contain 5% sodium as Na2O.  That's more than 10 times the concentration found in lunar rocks.  (See How Do We Know That It’s a Rock From the Moon?)
What is it?

Can't tell from photo.


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.