Why this rock is probably not a meteorite:

Perhaps it is. If it's lunar, then the white clasts are anorthosites. I suspect that the rock is not lunar, however, because I've never see a lunar breccia that had such a high proportion of large clasts in an apparently fine-grained matrix. The clasts in lunar regolith breccias are not well sorted. (Sorted is a geologic term meaning "all about the same size.") There is a whole range of sizes in lunar breccias. There too are many large clasts in this rock.
What is it?

Someone sent me this photo. It had a file name "Rare Lunar.jpg." There was a 1-sentence message in a language that I cannot understand. I think the sender wants to sell me the rock.

This might be a lunar breccia. It might also be a terrestrial conglomerate, or possibly even a piece of concrete. There's no way to tell from the 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.