Magnetite
Query URLs
https://term.museum-digital.de/md-de/tag/10668
- Note
- "Magnetite is a rock mineral and one of the main iron ores, with the chemical formula Fe3O4. It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. It is the most magnetic of all the naturally-occurring minerals on Earth. Naturally-magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, which is how ancient peoples first discovered the property of magnetism. Today it is mined as iron ore.
Small grains of magnetite occur in almost all igneous and metamorphic rocks. Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and leaves a black streak." - (en.wikipedia.org 28.04.2020)
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Magnetit
Magnetit
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Magnetit (geschliffen)
Magnetit (geschliffen)
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Drei gefasste Magnetsteine, 17. Jahrhundert
Als „Drey kleine armirte...
Object information
Image: Landesmuseum Württemberg, Stuttgart - CC BY-SA -
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Magnetit, andradit
Vasfekete (magnetit) és barna...
Object information
Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA
References
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