Why this rock is probably not a meteorite:

This one is a puzzler. The rock has a glassy coating on the right side that resembles a meteorite fusion crust. However, on a meteorite of this irregular shape, we'd expect the fusion crust to coat more than just one side. Also, on an oriented stone, we would expect to see signs that the ablation glass flowed from the leading side to the trailing side, but there's little hint of flow here.
What is it?

It might be a meteorite, but we suspect not. The rock was found 3 meters deep at a construction site in Singapore. If it's not a meteorite, we don't know what caused the apparent coating.

: Someone contacted me suggesting that the coating might be pyrobitumen.


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.