What is the occurrence of iron?

Iron is one of the most abundant elements on Earth, making up about 5% of the Earth's crust. It primarily occurs in nature in the form of minerals, with hematite and magnetite being the most significant iron ores. Iron is also prevalent in the Earth's core, where it exists in a molten state and contributes to the planet's magnetic field. Its widespread availability and essential role in various biological processes make it a crucial element in both geology and Biology.