Why this rock is probably not a meteorite:

The finder thought that this rock resembled lunar meteorite QUE 93069.  It does, but many kinds of terrestrial rocks superficially resemble lunar rocks. An impact of a meteoroid on the Moon both breaks rocks apart and glues other rock fragments together. Most lunar meteorites are breccias - rocks composed of bits and pieces of other rocks.  In the lunar meteorites, the light-colored grains are clasts of anorthosite rocks and feldspar (anorthite) mineral grains. 
What is it?

The rock is not a breccia. It appears to be an igneous rock (crystallized from a melt) that contains light-colored grains of some type of feldspar. Like nos. 084 and 086, it's a porphyritic volcanic rock because the light-colored mineral grains are larger than the dark matrix.


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.