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MAGNETITE
magnetite
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Name Magnetite crystals
Formula Fe3O4
Hardness (Mohs) 5.5-6.5
Density 4.85-5.20
Crystal System Cubic
Colour Black with a bluish hue
Lustre Metallic lustre
Associated minerals Chromite
Comment Magnetite is a valuable source of iron ore
Size of individual crystals 5-10 millimetres
Location Kola Peninsula, Russia


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