Magnetite
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Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+2O4. It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to
Magnetite from Bolivia
Magnetite is one of the very few minerals that is ferrimagnetic; it is attracted by a magnet as shown here
Magnetite and other heavy minerals (dark) in quartz beach sand (Chennai, India)
Octahedral crystals of magnetite up to 1.8 cm across, on cream colored feldspar crystals, locality: Cerro Huañaquino, Potosí Department, Bolivia
Lodestone
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Lodestones are naturally magnetized pieces of the mineral magnetite. They are naturally occurring magnets, which can attract iron. The property of magnetism was first discovered in antiquity through l
Lodestone in the Hall of Gems of the Smithsonian
Lodestone attracting small bits of iron