Eric Walker added Collections: Iron, How Did They Make It? Part I, Mining – A Collection of Unmitigated Pedantry to a number of topics

Eric Walker added Magnetite - Wikipedia to Magnetite

Eric Walker added Magnetite to Magnetic materials, and added Magnetic materials to Magnetism and Atoms, molecules, chemicals, minerals, materials and compounds

Eric Walker added Dunite and Collections: Iron, How Did They Make It? Part I, Mining – A Collection of Unmitigated Pedantry and Magnetite - Wikipedia to Magnetite, and added Magnetite to Magnetic materials and Iron oxides

Eric Walker added a number of topics to Iron oxides, and added Iron oxides to Oxidation and oxides, Minerals and gems and Iron

Eric Walker added Dunite - Wikipedia to Dunite, and added Dunite to a number of topics