Dark gray to black. Crystal System. Crystal Forms and Aggregates. Crystals are usually octahedral , and they may be very well-formed.
Less commonly dodecahedral. Crystals may exhibit interesting combinations of octahedral and dodecahedral faces. Spinel twin ning is an occasional habit, and an unusual cubic form is well-known from one specific locality. Crystals may be striated , and some octahedral crystals contain layer growths. Also drusy , grainy , in vein s, as large embedded grain s, as rounded crystals, and massive.
Specific Gravity. May exhibit parting. Subconchoidal to uneven. Other ID Marks. Is ferromagnetic , meaning it is strongly attracted to magnetic field s. In Group. Oxides ; Multiple Oxides. Striking Features. Strong attraction to magnet s, hardness , and streak. Occurs in igneous rock such as diabase , as well as contact and regional metamorphic rocks and in hydrothermal replacement deposits. Rock Type. Igneous , Metamorphic. Popularity Prevalence Demand Chrome-magnetite - Chromiumrich variety of Magnetite.
Lodestone - Massive , magnetic variety of Magnetite that acts as a natural magnet. Martite - Hematite pseudomorph after Magnetite. It is relatively stable under surface soil conditions, but may weather to different secondary minerals. There is some speculation, based mainly on studies of the magnetic properties of soils, that fine-grained magnetite may form in soils. Magnetotopic bacteria have been shown to produce magnetite under appropriate conditions. Magnetite can be readily separated from soil with the use of a hand magnet.
The variation of the ratio of magnetite to other resistant minerals is used in soil genesis studies to determine provenance or similarity of sediment origins. Wechsler, B.
Lindsley, and C. Magnetite facilitates more extensive storage of thermal heat much more sustainably compared to other materials. The mineral helps to prevent surface defects in metal fixtures in foundries. Magnetism has been used traditional therapies for thousands of years, though modern science disputes therapeutic effect in placebo trials.
The Greeks used magnetism in ancient treatments in 5th century BC. In China, magnets have been integrated into traditional therapy for over years, magnetism was also in traditional therapeutics in India and ancient Egypt to heal broken bones and other ailments. Hippocrates described their healing power in the same way as the legendary doctor Paracelsus, who recommended treatments with magnets. Even during this time, women and men wore jewelry made from magnetic ores.
In ancient times magnetite mining became a major economic activity in the Thessalian city of Magnesia. Today, like the ancient Greeks, Canada has a reputation as a leading mining nation with the minerals sector as a core part of the economy.
Close Menu Facebook. Mount Polley Photos. Image gallery. Magentite ore. Crystal structure of magnetite: oxygen gray , divalent iron green , trivalent iron blue , iron ion in octahedron gap light blue octahedron , iron ion in tetrahedron gap gray tetrahedron — Wikimedia commons History of magnetite mining Magnetite is one of the most powerful magnetic minerals. Magnetite is magnetic! Illustration of Magnes the shepherd The mineral might have also been named after Magnesia, a landscape in Thessaly or the city of Magnesia.
Occurrence Magnetite occurs in solid or granular form and also as crystals. Magnetite Magnetite is found in numerous igneous rocks such as basalt, diabase, and gabbro in metamorphic rocks. Scrap metal recycling Potash mining is a significant industry in Canada, particularly in the province of Saskatchewan. Potash mining Electrical industry Along with hematite, Magnetite is one of the essential iron ore. As a building material Magnetite is used in the construction industry as a naturally granular aggregate with a high bulk density 4.
Magnetite in jewelry Classic jewelry clasps are often extremely filigree and, therefore, difficult to close. Wearing jewelry is helped by magentic clasps Heat storage Industries use natural iron oxide minerals because they can keep the heat very efficiently.
Magnetite is used in foundry metal protection The mineral helps to prevent surface defects in metal fixtures in foundries. Magnetic therapeutic beliefs in ancient times Magnetism has been used traditional therapies for thousands of years, though modern science disputes therapeutic effect in placebo trials.
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