I am delighted to present yet another fascinating micrometeorite, which was found in the gutter of a school near my home. NMM 507 is a delightful porphyritic olivine (PO) type particle measuring 0.2 mm with a very unique dark green color. As lovely as these features are, however, its three glassy tails make it truly rare.

Not long ago, this micrometeorite may have been part of a large speck of cosmic dust spinning rapidly in outer space. Upon atmospheric entry, I hypothesize that the larger particle was torn apart before cooling rapidly, perhaps in water. I suggest that this micrometeorite could be one of its pieces.

The glass lacks indications of weathering, so we know this little space rock is very fresh.

In this article, I present a color photo and a scanning electron microscope (SEM) image of NMM 507, so that you may enjoy all of its remarkable details. The SEM images have unsurpassed resolution, but the color photo reveals qualitative data, such as its color and translucence — what the object “really” looks like.

I hope you’ve enjoyed reading about the cosmic moment that I believe formed this gem. Get in touch with me on Facebook, Instagram, or Twitter to let me know what you think of my hypothesis! I always welcome and appreciate alternative explanations!

Yours truly,

Jon Larsen