The Magnetic Minerals are few, but the property is important because of this fact. Once a specimen is established as magnetic, identification becomes a rather routine exercise. The mineral magnetite is named after this characteristic.. Magnetism occurs (most often) when there is an imbalance in the structural arrangement of the iron ions.
A list of magnetic rocks would include chromite, tantalite, ilmenite, and columbite.
Rock magnetism is the study of the magnetic properties of rocks, sediments and soils. The field arose out of the need in paleomagnetism to understand how rocks record the Earth's magnetic field. This remanence is carried by minerals, particularly certain strongly magnetic minerals like magnetite ...
Although there is not a specific rock that is magnetic, certain magnetic properties of a rock may be found in the crystals and minerals that make up a rock. The magnetic mineral magnetite is commonly found in igneous rocks.
Magnetic with definite north and south poles Magnetite is a rock mineral and one of the main iron ores , with the chemical formula Fe 3 O 4 . It is one of the oxides of iron , and is ferrimagnetic ; it is attracted to a magnet and can be magnetized to become a permanent magnet itself.
Other articles where Rock magnetism is discussed: rock: Magnetic properties: The magnetic properties of rocks arise from the magnetic properties of the constituent mineral grains and crystals. Typically, only a small fraction of the rock consists of magnetic minerals.
Many rocks have magnetic properties (are capable of beingmagnetized, are magnetic or are attracted by a magnet) derived frommagnetic minerals in.
The major rock-forming magnetic minerals are iron oxides and sulfides. Although the magnetic properties of rocks sharing the same classification may vary from rock to rock, general magnetic properties do nonetheless usually depend on rock type and overall composition.
Magnetic Properties of Rocks and Minerals Christopher P. Hunt, Bruce M. Moskowitz, Subir K. Banerjee 1. INTRODUCTION This is an updated collation of magnetic parameters of rocks and minerals for geologists, geochemists, and geo- physicists. Since the publication of the previous edition of Handbook of Physical Constants , two other collations
NOTE: Most mineral guides list minerals attracted to magnetic fields as "magnetic".This may lead to confusion, for there is a difference between "magnetic" (acts as a magnetic field) and "attracted to magnetic fields" (drawn toward magnetic fields).