What is the name for a naturally occurring magnetic material previously known as magnetite?

• A. Hematite
• B. Pyrrhotite
• C. Magnetite
• D. Lodestone

Answer: (D)

Natural magnetism in minerals and how the magnetized form is named. Lodestone is the term for a naturally occurring piece of magnetite that has become magnetized and can attract iron, aligning with Earth's magnetic field. This natural magnetism made lodestone useful in early navigation, as it functioned like a compass needle. The mineral magnetite (Fe3O4) is the source, but when it is magnetized in nature, it is called lodestone. The name comes from Old English meaning “leading stone.” Other minerals like hematite are not the same magnetically, and while pyrrhotite can be magnetic, it isn’t the traditional term for a naturally magnetized magnetite. So the correct name for that naturally magnetized material is lodestone.