A lodestone/piece of Magnetite (Naturally occurring magnet) mounted so that it can be carried in a belt. Place of origin unknown (possible Britain), 1550-1600 AD. [979x1280] : r/ArtefactPorn
Set of 3 Lodestone Rocks Naturally Occurring Magnet 1.0 1.5 - Etsy.de
Natural and Artificial Magnet - Definition, Difference and Examples