Curie Point or Temperature Temperature above which a mineral cannot be permanently magnetized declination Horizontal angle between geographic north and magnetic north lodestone A piece of magnetite possessing polarity like a magnet or magnetic needle and hence one that, when freely suspended, will attract iron objects.
Magnetite is a very common and widely distributed accessory mineral in rocks of all kinds.
It also occurs as a heavy mineral in sands. A natural remanent magnetization closely parallel to the present ambient geomangetic field direction. A configuration of the Earth's magnetic field with the magnetic negative pole located near the geographic north pole. A configuration of the Earth's magnetic field with the magnetic positive pole where field lines leave the Earth , located near the geographic north pole.