NMM 2097 - Skedsmo (Grove Knudsen)

NMM 2097 Skedsmo (Grove Knudsen) is a giant, over 0.5 mm across, and a rare beauty. It is a bluish-grey cryptocrystalline (CC) droplet with stunning crystallisations. A shiny sulphide rim surrounds the large metal bead at the front, indicating a short terrestrial age, as sulphide dissolves quickly during weathering.

The most striking feature, however, is the unusual glassy tail, brown from traces of Fe3+, with a black cap at the end. What caused this? I am unsure, but I suspect it is related to NMM 2583, another CC with a long brown glass tail, formed as a twin during rapid spin in atmospheric entry. In any case, NMM 2097 is a unique micrometeorite and a prized addition to any collection.

 

PROVENANCE: The catalogue number refers to

the NMM archive, the index of Jon Larsen’s

Project Stardust collection, which is the  reference

collection for urban micrometeorites. The stone

was found,  curated, and selected by Larsen.

It is in pristine condition, fresh from  Space.

Follow Jon Larsen’s Project Stardust and get

exclusive micrometeorite content:

https://www.patreon.com/c/ProjectStardust826

 

VERIFICATION: The MM has been confirmed

extraterrestrial by visual identification and/or

SEM/EDS analysis by Jon Larsen. The stone is

mounted on a durable aluminium/glass/cardboard

microslide and is delivered together with a signed

Certificate of Authenticity and photographic files.

This micrometeorite is a unique museum-quality

specimen and a jewel in any collection.