Pallasites are stony-iron meteorites that make up only 0.2% of the global meteorite collection! The characteristic feature of these meteorites are the large olivine grains that are surrounded by a network of FeNi metals. We can also find minerals such as chromite, troilite and shreibersite in small grains across pallasites, and we saw this during our analysis of OSM 010. Pallasites are often incredibly pretty, in fact, you may have seen a photo of these meteorites with a light behind them like the photo below, to show the windows of olivine between the surrounding network of FeNi metal.

Layered image of OSM 010, where blue is olivine in, green if Fe metal, yellow is FeNi metal, pink is shreibersite, orange is troilite and purple is chromite.

Photo of the Imilac pallasite (source: Natural History Museum)

The general understanding of pallasite meteorites is that they represent the core-mantle boundary of differentiated asteroids (asteroids that have been heated, partially melted and separated into a core, mantle and crust). With Earth also having a core, mantle and crust, these meteorites can provide us with a detailed insight into the processes that may have helped form our planet!