Porphyritic olivine (PO) from the Atlas of Micrometeorites.
Micrometeorite NMM 1172 is an average sized (~0.25 millimeters) porphyritic olivine (PO) type stone with an irregular but aerodynamic form. It has large olivine crystals in abundant olive chondritic glass. In the front there is a large nickel-iron mound, and a secondary smaller bead at the rare end, due to spin during atmospheric entry. A few smaller magnetite crystals are visible on the surface in the SEM image. The stone was found 2018 0422 in the rain gutter of Jon Larsen’s house in Brevik, Viken, Norway – where the World’s very first urban micrometeorite had been found three years earlier. Read the full story here: Star Hunter.
NMM 1172 - Brevik
Top quality micrometeorite mounted on a signed microslide (cardboard/aluminium/glass). The stone is purchased from Jon Larsen via Treasures From Space. The stone is in pristine condition (no sign of weathering, low terrestrial age), complete and oriented. The stone depicted in the Atlas of Micrometeorites on page 170.
The stone is a part of the collection found during the fourth season of micrometeorite findings/verification in populated areas (2018). The catalogue number refers to the NMM archive (the main index of Norwegian Micro Meteorites, Jon Larsen’s urban Stardust Collection), and the stone was found and curated by Jon Larsen.
The MM has been confirmed extraterrestrial by SEM/EDS analysis and visual identification by Jon Larsen, and is a verified micrometeorite, hereby confirmed in writing. The stone is sold with this Certificate of Authenticity incl. classification, a signed label, plus a portfolio of one digital color photo, and one backscatter SEM image.