I recently read a report stating that magnetic material has been detected in human nasal bones, so i decided to carry out a little experiment myself.
Firstly i sawed through a horse metacarpal, then carefully scraped the inner bone with an aluminium needle. I then placed strong magnets on the scraped out bone .
The magnets attracted the bone material i made sure there was no contamination to any of the items used. I can only presume that the bone contains some form of magnetite.