Magnetite is a common iron oxide that is found in many beach sands and orebodies. The mineral is nonmagnetic,except for a unique variety called lodestone that has acquired natural magnetism within the earth. This material was undoubtedly the original source of magnets such as were used by mariners in previous centuries | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Arem, Joel |
Bildgröße: | 2550 px × 3790 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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