: count(): Parameter must be an array or an object that implements Countable in /home/mindat/gemdat/gemshow_class.php
on line 147
Natural magnets (lodestones) were known to ancient Greeks, who called this mineral "magnet", because it was found in the lands of the Magnetes (Magnesia) in Thessaly.
Magnetite is a heavy material, black or brownish-black with a metallic luster. It is the most magnetic of all natural commonly occurring minerals on the Earth.
The originally bright black colour can gradually change to dark brown.
Magnetite is often used in jewelry due to its supposed magnetic healing properties.