Magnetite

Magnetite is best known for its property of being strongly attracted to magnets. Some forms of Magnetite from specific localities are in fact themselves magnets. Crystals are usually octahedral, and they may be very well-formed. Less commonly dodecahedral. Crystals may exhibit interesting combinations of octahedral and dodecahedral faces. Magnetite is an important ore of iron. Well formed crystals are popular among mineral collectors.