Iron is one of the commonest elements in the Earth’s crust. This means that nearly all geological materials contain some iron-bearing magnetic minerals, even if only in trace amounts. Research into various aspects of mineral magnetism is performed at the Black Mountain Palaeomagnetic Laboratory. Projects include reconstructing the past behaviour of Earth’s magnetic field from geological materials and quantifying environmental change from the magnetic mineral inventory of sediments. The Palaeomagnetism Laboratory is home to the research group of Prof. Andrew Roberts and houses a number of state-of-the-art instruments for detecting and characterizing magnetic mineral particles.