A mineral and one of the main iron ores, an iron oxide that is ferrimagnetic: attracted to a magnet and able to be magnetized into a permanent magnet itself. Apart from extremely rare native iron deposits it is the most magnetic of all naturally occurring minerals on Earth, and naturally magnetized pieces called lodestone are how ancient peoples first discovered magnetism. Its locked-in magnetization is also the record paleomagnetism reads.
A mineral and one of the main iron ores, an iron oxide that is ferrimagnetic: attracted to a magnet and able to be magnetized into a permanent magnet itself. Apart from extremely rare native iron deposits it is the most magnetic of all naturally occurring minerals on Earth, and naturally magnetized pieces called lodestone are how ancient peoples first discovered magnetism. Its locked-in magnetization is also the record paleomagnetism reads.
Facts
Formation ClassOxide mineral (iron oxide), forming as an accessory mineral in igneous and metamorphic rocks and as a major constituent of banded iron formations. 1 Formation ClassOxide mineral (iron oxide), forming as an accessory mineral in igneous and metamorphic rocks and as a major constituent of banded iron formations. 1 Chemical FormulaFe3O4 (iron(II,III) oxide) 1 Chemical FormulaFe3O4 (iron(II,III) oxide) 1 Hardness (Mohs)Commonly cited range is 5.5 to 6.5 on the Mohs scale; 6.0, the midpoint, is used here. Hardness (Mohs)Commonly cited range is 5.5 to 6.5 on the Mohs scale; 6.0, the midpoint, is used here. Classification
Strunz Class Strunz Class Crystal System Crystal System UseOre or Metal Extraction 1 UseOre or Metal Extraction 1 Connections
Associated With
Magnetite and hematite are both principal iron oxide ore minerals.
Source Magnetite (Wikipedia)
Magnetite named as an important accessory mineral of slate.
Source Slate (Wikipedia)
Caused By
Source Fractional crystallization (geology) (Wikipedia)
Additional Source Ore genesis (Wikipedia)Magmatic processes
Source Serpentinization (Wikipedia)
Crystallizes In System
In Discipline
Magnetite is one of the two principal iron ore minerals, mined at industrial scale.
Source Magnetite (Wikipedia)
Source Magnetite (Wikipedia)
The magnetization magnetite locks in when it forms is the record paleomagnetism reads.
Source Magnetite (Wikipedia)
In the Other Atlases
Mineral Species Of
Also in Divinity Atlas: of this mineral species.
Sources
1. Magnetite (Wikipedia)
Wikimedia FoundationLead section
With the exception of extremely rare native iron deposits, it is the most magnetic of all the naturally occurring minerals on Earth.
Infobox: mohs
5.5-6.5
Lead section
Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+2O4.
Infobox: system
Isometric
Magnetite (Wikipedia), body text
magnetite has long been a major iron ore
In Discipline: Economic Geology, Uses section
Due to its high iron content, magnetite has long been a major iron ore.
View the Source 2. minerals.net: Magnetite
minerals.netColor field
Dark gray to black
Luster field
Metallic
Description
Magnetite is a common mineral.
View the Source Wikidata: Magnetite
Wikidata Q181395
Slate (Wikipedia)
Wikimedia FoundationAssociated With: Slate, Composition sectionQuote, Associated With: Slate, Composition section
The most important accessory minerals are iron oxides (such as hematite and magnetite), iron sulfides (such as pyrite), and carbonate minerals.
Ore genesis (Wikipedia)
Caused By: Fractional Crystallization, Magmatic processesQuote, Caused By: Fractional Crystallization, Magmatic processes
Chromite and magnetite are ore minerals that form in this way.
Fractional crystallization (geology) (Wikipedia)
Caused By: Fractional Crystallization, Igneous rocksQuote, Caused By: Fractional Crystallization, Igneous rocks
The crystallization sequence of oxide minerals such as magnetite and ulvospinel is sensitive to the oxygen fugacity of melts
Serpentinization (Wikipedia)
Caused By: Serpentinization, LeadQuote, Caused By: Serpentinization, Lead
Minerals formed by serpentinization include the serpentine group minerals (antigorite, lizardite, chrysotile), brucite, talc, Ni-Fe alloys, and magnetite.
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