The primary mineral found in the Earth's core is iron. This dense, metallic element comprises a significant portion of the Earth's inner and outer core. The inner core is solid, while the outer core is liquid, both contributing to Earth's magnetic field through fluid motion and convection processes. The high temperatures and pressures present within the core facilitate the existence of iron in these states. Iron's abundance in the core has implications for understanding tectonic activities, magnetic phenomena, and the Earth's overall geological structure.