NMM 1930 Vestby is a green glass (V-type) specimen of significant scientific importance. It is the type specimen for the “crackelation” phenomenon, a term coined by Matthew Genge. Recognised by micrometeorite collectors worldwide, this iconic stone is featured on two full pages (300—301) in the Atlas of Micrometeorites. A historic opportunity to acquire.

The stone measures about 0.3 mm in diameter, with a nickel-iron bead at the front, surrounded by a narrow crystalline zone, pit erosion, and a sulphide rim. At the rear, it has a large open gas vesicle. Like many similar glass micrometeorites, it is partly hollow due to expansion and the escape of volatiles.

During atmospheric deceleration, cooling started on the outside and moved inward. At some stage during formation, the glass surface cracked, but because the underlying glass was still molten, the broken pieces remained in place, forming an almost brecciated texture. The result is a layered glass bubble with a spider-web crackle on the outside and a striking iridescent oxidation layer on the surface. This micrometeorite has everything!

 

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.