mineral
Hematite Concretion
Iron(III) oxide (Fe2O3)
AI-generated identification · may be incorrectHardness of 5.5 to 6.5 on the Mohs scale, reddish-brown to steel-gray color, metallic to dull luster, and leaves a characteristic reddish-brown streak.
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Physical properties
Hardness of 5.5 to 6.5 on the Mohs scale, reddish-brown to steel-gray color, metallic to dull luster, and leaves a characteristic reddish-brown streak.
Formation & geological history
Forms through precipitation from aqueous solutions in sedimentary environments or hydrothermal processes, often spanning millions of years.
Uses & applications
Used primarily as an iron ore, in pigments, and occasionally polished for lapidary items and jewelry.
Geological facts
Hematite is the most important ore of iron worldwide and has been used to create red pigments for cave paintings dating back tens of thousands of years.
Field identification & locations
Easily identified by its reddish-brown streak and heavy weight, commonly found in iron-rich sedimentary rock layers worldwide.
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Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
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