Hematite

ID	558
Mineral	Hematite
Location	Unknown - Unknown - Unknown - Unknown
Fluorescence	LW-UV: close SW-UV: close
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Mindat data

ID	1856
Long ID	1:1:1856:8
Formula	`Fe₂O₃`
IMA Status	0 1
Other Occurrences	Large ore bodies of hematite are usually of sedimentary origin; also found in high-grade ore bodies in metamorphic rocks due to contact metasomatism, and occasionally as a sublimate on igneous extrusive rocks ("lavas") as a result of volcanic activity. It is also usually the cause of red soils all over the planet.
Industrial	A major ore of iron.
Diapheny	Opaque
Tenacity	brittle
Colour	Steel-grey to black in crystals and massively crystalline ores, dull to bright "rust-red" in earthy, compact, fine-grained material.
Hardness (min)	5.0
Hardness (max)	6.0
Luminescence	None
Lustre	Metallic
About the name	Originally named about 300-325 BCE by Theophrastus from the Greek, "αιματίτις λίθος" ("aematitis lithos") for "blood stone". It is possibly the first mineral ever named ending with a "-ite" suffix. Translated in 79 by Pliny the Elder to haematites, "bloodlike", in allusion to the vivid red colour of the powder. The modern form evolved by authors frequently simplifying the spelling by excluding the "a", somewhat in parallel with other words originally utilising the root "haeme".
Streak	Reddish brown ("rust-red")
Crystal System	Trigonal
Cleavage Type	None Observed
Fracture type	Irregular/Uneven,Sub-Conchoidal
Morphology	Crystals generally thick to thin tabular {0001}, rarely prismatic [0001] or scalenohedral; also rarely rhombohedral {10_11}, producing pseudo-cubic crystals. Often found in sub-parallel growths on {0001} or as rosettes ("iron roses.") Sometimes in micaceous to platy masses. May be compact columnar or fibrous masses, sometimes radiating, or in reniform masses with a smooth fracture ("kidney ore"), and botryoidal and stalactic. Frequently in earthy masses, also granular, friable to compact, concretionary and oolitic.
Twinning	Penetration twins on {0001}, or with {10_10} as a composition plane. Frequently exhibits a lamellar twinning on {10_11} in polished section.
UV	None.
shortcode_ima	Hem
Group	Hematite Group

Price: € 2

Dimensions: Not registered

Weight: Not registered

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Symbol	Element
Fe	Iron
O	Oxygen

Hematite

Mindat data

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