Lodestone
or Loadstone. The magnet or stone that guides.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894 More on Lodestone from Fact Monster:
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- iron: Natural Occurrence - Natural Occurrence Iron is an abundant element in the universe; it is found in many stars, ...
- William Gilbert - Biography of William Gilbert, The guy who figured out magnetism and electricity
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