Why this rock is probably not a meteorite:

1) There is no fusion crust.

2) It's too spherical.  Meteorites are never this spherical.

3) It's vesicular (click here for a closeup view). No meteorite yet found is this vesicular.
What is it?

It appears to be some kind of volcanic rock. It is very similar in texture to the Hawaiian basalt pictured at the top of this page.

On Earth, there are at least 3 ways that spherical rocks are formed. Some spherical rocks are concretions, like nos. 001 & 050. Others are rocks that started out blocky with sharp edges and have been eroded down to a spherical shape by thousands of years of bumping and grinding against other rocks. Such rocks are usually formed near the shoreline of large bodies of water or by glaciers. The rock depicted here was probably rounded by such a process (also, nos. 003, 007, 013, 020, & 060). Finally, human beings make spheres from rocks and other materials (probably nos. 023, 064, & 087).


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.