Magnetite is an iron oxide, with the chemical formula Fe3O4. It is one of the richest and most abundant iron minerals and belongs to the spinel group. Crystallizes in the monometric system. The most common crystalline form is the octahedral one. It is the most magnetic of all natural minerals on Earth. The naturally magnetized pieces of magnetite are called magnets and attract small pieces of iron. Magnetite is black or brownish with a metallic luster and has a Mohs hardness of 5-6. Small grains of magnetite are very common in igneous and metamorphic rocks. Magnetite has been a fundamental tool in paleomagnetism, an important science for understanding plate tectonics.
Dimensions
Height (cm): 0.7
Depth (cm): 0.6
Width (cm): 1
Weight (g): about 5 gr
Property
Chemical formula: Fe3O4
Mohs scale: 5.5-6.5
Relative density: 5.1-5.2
Crystalline System: Cubic
