Maginetiti ni madini yenye rangi nyeusi-kijivu yenye tabia ya sumaku. Kikemia ni oksidi ya feri (chuma) yenye valensi za 2+ na 3+. Fomula yake ni Fe3+2Fe2+O4. Inatokea mara nyingi kwa umbo la fuwele zenye urefu wa karibu sentimita 1 na kona 8. Kiwango cha feri (chuma) hufikia asilimia 72 kwa hiyo ni malighafi muhimu kwa kutengeneza chuma. Mineral galleries Powder X-Ray Diffraction (XRD) Pattern Archived 16 Aprili 2009 at the Wayback Machine. Bio-magnetics History of Magnetite Mining in the NJ Highlands Magnetite mining in New Zealand Accessed 25-Mar-09 Magnetite mining in Santa Cruz Archived 20 Machi 2007 at the Wayback Machine. Peruvian sand dunes