Magnetite is the most magnetic type of rock in the world. It is so magnetic that it is able to hold and lock an anomaly inside it and be able to move it around. The Sun Cage, formerly in the British Museum and then moved to Pyongyang, was constructed of magnetite in ancient Egypt and contains an anomaly which has remained trapped inside it ever since.
 |
Wikipedia has a more detailed and comprehensive article on Magnetite! |
In episode Episode 5.6, Connor and Matt use an adapted Sun Cage called the Magnetic Case to move the New Dawn Prototype Anomaly to the New Dawn Anomaly in order for them to merge them together to stop Convergence