Magnetism is a very conspicuous property of a few minerals. Among common minerals, magnetite exhibits this property strongly, and magnetism is also present, albeit not as strongly, in pyrrhotite and ilmenite. Some minerals exhibit electrical properties – for example, quartz is piezoelectric – but electrical properties are rarely used as diagnostic criteria for minerals because of incomplete data and natural variation.
Magnetism is a very conspicuous property of .a few minerals. Among common minerals, magnetite exhibits this property strongly, and m?agnetism is also present, albeit not :as strongly, in pyrrhotite and ilmenite. Some minerals exhibit electrical proper.ties – for example, quartz is piezoelectric – but electrical properties are rarely used as diagnostic cr?iteria for minerals because of incomplete data and natural variation.