Collection
Classification: MG PAL (Main-group pallasite)
Pallasite (main group), based on texture, grain size of olivine and olivine composition
Observed fall: No
Year found: 2022
City, Country: Adrar, Algeria
Mass: 730 g
In collection
Weight #1 : 2,91 g
Weight #2 : 8,08 g
Weight #3 : 13.22 g
Certificate of authenticity: Yes (3)
Main-group pallasites are a type of stony-iron meteorite distinguished by their mesmerizing structure of olivine crystals embedded within a nickel-iron metal matrix. These meteorites are thought to originate from the boundary region between the core and mantle of differentiated asteroids or proto-planets. The main-group classification is the most prevalent among pallasites, offering valuable insights into planetary formation and the thermal and chemical processes of early solar system bodies. Their unique composition not only makes them scientifically significant but also highly sought after by collectors for their aesthetic appeal.
When examining a Main-group pallasite meteorite under a light microscope, several distinctive features can be observed:
- Olivine Crystals: The most prominent component is the large olivine grains. Under transmitted light, olivine appears transparent or translucent with high relief.
- Metallic Matrix: The nickel-iron metal in pallasites is opaque under transmitted light microscopy, appearing as dark or black areas. However, using reflected light microscopy, the metallic phases become visible, revealing a shiny, metallic luster. This allows for the observation of the texture and distribution of the metal relative to the olivine crystals.
