Franklinite with magnetite from Franklin, New Jersey, USA. Franklinite and magnetite are both members of the spinel group. Magnetite is iron oxide, and franklinite is primarily a zinc-iron oxide. Magnetite is common
File:Magnetite crystals (Magnet Cove Complex, mid-Cretaceous, 96-102 Ma; Perovskite Hill, Magnet Cove, Arkansas, USA) 1.jpg - Wikimedia Commons
Magnetite: Mineral information, data and localities.
Magnetite: proprietà, benefici e 3 utilizzi - Alchimia delle Pietre
Magnetite - Wikipedia
Magnetite - KRC-21 - Grace Mine - USA Mineral Specimen
Magnetite: Mineral information, data and localities.
Magnetite. minerals. North America; USA; Pennsylvania; Chester County; French Creek Stock Photo - Alamy
File:Magnetite skarn (Early Miocene, 22-23 Ma; iron mine at Iron Mountain, Utah, USA) 1.jpg - Wikimedia Commons
Magnetite - old classic locale, ex Hauck | 20 Panel, Drift 200, Grace Mine, Morgantown, Pennsylvania, USA
Magnetite (old USA locality) - Laurel Hill, Secaucus, Hudson Co., New Jersey, USA - Bid on Mineralauctions.com | Magnetite, Fine minerals, Crystals and gemstones
Magnetite from Balmat, Balmat-Edwards Zinc Mining District, St. Lawrence County, New York, USA
Magnetite - Wikipedia
Magnetite (significant USA specimen) | ZCA #4 Mine (2500' level), Balmat, New York, USA