1. Magnetite (Fe₃O₄): This is the most common naturally occurring ferromagnetic mineral. It is also known as lodestone, and it was the first magnetic material known to humans.

2. Hematite (Fe₂O₃): Hematite can exhibit ferromagnetic properties at low temperatures. It is a reddish-brown mineral found in many rocks and soils.

3. Pyrrhotite (Fe_1-xS): Pyrrhotite is a sulfide mineral that can be ferromagnetic, depending on its composition. It has a bronze-like color.

4. Nickel (Ni): While not as common as iron-based minerals, nickel is a naturally occurring ferromagnetic element found in certain types of rocks.

It's important to note that the ferromagnetic properties of these materials can be influenced by their composition, temperature, and other factors.