Native iron is a rare terrestrial mineral typically found in basaltic rocks or as a major component of metallic meteorites. It is strongly magnetic and prone to oxidation, requiring careful storage to prevent rust. Collectors prize samples for their significant weight and extraterrestrial or unique geological origins.
Is this iron?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch iron with a known reference. Iron sits at Mohs 4-5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Iron leaves a gray streak.
- 3Read the lusterHold the specimen under a strong light. Iron typically shows a metallic luster.
- 4Match the color rangeCompare against the expected color range: steel-gray, iron-black.
- 5Look at form & habitCrystal system: cubic. Typical habit: massive, granular, rarely as cubes or octahedra.
Often confused with
Iron vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Streak differs — Iron leaves gray, Magnetite leaves black.
How to tell apart: Streak differs — Iron leaves gray, Iron Ore leaves reddish-brown to black; luster reads metallic on Iron and metallic to submetallic on Iron Ore.
Often found alongside iron
Minerals reported to co-occur with iron. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Fe
- Mohs hardness
- 4-5
- Density
- 7.3-7.8 g/cm³
- Colors
- Streak
- Gray
- Luster
- Metallic
- Transparency
- Opaque
- Crystal system
- Cubic
- Crystal habit
- Massive, Granular, Rarely as Cubes or Octahedra
- Cleavage
- None
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Basaltic Flows or Meteorites
- Typical price
- $50-500 depending on specimen provenance and size
Where rockhounds find iron
18 mapped spotsClassic worldwide localities
- Disko Island, Greenland
- Kola Peninsula, Russia
- Bühl, Germany
- meteorite impact sites
U.S. states with iron
Each link opens a state-specific list of mapped rockhounding spots that produce iron.
Field-hunting tip
Look in basaltic flows or meteorites country — that is the host setting where iron typically forms. If you start seeing basalt, magnetite, wüstite in float, you are in the right ground. Field specimens usually show a massive, granular, rarely as cubes or octahedra habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in Minnesota, Nevada, Georgia — start trip planning there.
Common questions
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Find iron on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
