* Magnetite (Fe₃O₄): This is the most common magnetic mineral and is responsible for the magnetism of the Earth.

* Pyrrhotite (Fe_1-xS): This mineral is weakly magnetic and can be found in various forms, some of which are strongly magnetic.

* Hematite (Fe₂O₃): While not inherently magnetic, hematite can become weakly magnetic due to certain crystal structures and impurities.

* Lodestone: This is a naturally occurring form of magnetite that is highly magnetic.

Other minerals that can exhibit weak magnetism include:

* Ilmenite (FeTiO₃)

* Goethite (FeOOH)

* Chromite (FeCr₂O₄)

It's important to note that not all samples of these minerals will be magnetic. The degree of magnetism can vary depending on factors like the mineral's composition, crystal structure, and impurities.