Lodestone
material · 600 BC · Ancient world
A naturally magnetic mineral.
Principles and materials it uses
- Magnetism — uses. A natural magnet.
Where it is used
- South-pointing spoon (Chinese compass) — is material for. Lodestone.
- Permanent magnet — is material for. The first magnets were pieces of lodestone.
History: what it evolved from and what it influenced
- Permanent magnet — evolved into. The first magnets were lodestone.