Widmanstätten patterns are distinctive geometric structures found in certain meteoric iron and some steel alloys, characterized by a unique interplay of nickel and iron. Named after the Austrian scientist Alois Widmanstätten, these patterns form through a slow cooling process, allowing for the separation of nickel-rich and iron-rich phases. Widmanstätten patterns can often be observed in samples of meteorites, particularly those that are composed of iron-nickel alloys, and are used to analyze the thermal history and formation processes of these celestial materials.