Iron Ore
What is Iron Ore?
Iron ore is a rock from which metallic iron can be economically extracted. The principal iron ore minerals are hematite (Fe2O3) and magnetite (Fe3O4). Iron ores are typically found in banded iron formations (BIFs), which are sedimentary rocks composed of alternating layers of iron oxides and silica. The formation of iron ore deposits is often associated with ancient geological processes, including the oxidation of iron in seawater and subsequent precipitation. Iron ore is a crucial raw material for the production of steel, which is used in a wide range of industries, including construction, manufacturing, and transportation.
Optical Properties
- Refractive Index
- 2.42
- Birefringence
- 0.226
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- 0.24
Discover Values
This stone excels in cultural value.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Iron Ore before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Iron Ore Localities Map
See where Iron Ore is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Various, including red, brown, yellow, and black
- Hardness (Mohs)
- 5.5-6.5
- Density
- 3.5-5.2 g/cm³
- Luster
- Metallic, dull to earthy
- Crystal System
- Isometric
Chemical Properties
- Chemical Formula
- Fe2O3 (Hematite), Fe3O4 (Magnetite)
- Elements
- Fe, O
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Iron Ore FAQs
How do I identify Iron Ore?
Iron Ore can be identified by its hardness of 5.5-6.5 on the Mohs scale, Various color, Metallic, dull to earthy luster, Isometric crystal system. Look for these key characteristics when examining specimens.
What color is Iron Ore?
Iron Ore typically appears in Various, including red, brown, yellow, and black. Color can vary depending on impurities and formation conditions.
How hard is Iron Ore?
Iron Ore has a hardness of 5.5-6.5 on the Mohs scale. This gives it moderate hardness.