Native Copper is an iconic metal that often occurs as heavy, reddish-brown masses or intricate branching wire-like structures. Collectors should look for its characteristic copper-red metallic luster on fresh surfaces, though it is frequently covered by a dull brown tarnish or a soft green malachite crust.
Is this native copper?
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 native copper with a known reference. Native Copper sits at Mohs 2.5-3 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Native Copper leaves a copper-red streak.
- 3Read the lusterHold the specimen under a strong light. Native Copper typically shows a metallic luster.
- 4Match the color rangeCompare against the expected color range: copper-red, reddish-brown, tarnished-brown, green-patina.
- 5Look at form & habitCrystal system: cubic. Typical habit: massive, dendritic, arborescent, wire, plates.
Often confused with
Native Copper vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Nickeline is the harder of the two (Mohs 5-5.5 vs. 2.5-3); streak differs — Native Copper leaves copper-red, Nickeline leaves brownish-black.
How to tell apart: Streak differs — Native Copper leaves copper-red, Algodonite leaves white.
Often found alongside native copper
Minerals reported to co-occur with native copper. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Cu
- Mohs hardness
- 2.5-3
- Density
- 8.9 g/cm³
- Streak
- Copper-red
- Luster
- Metallic
- Transparency
- Opaque
- Crystal system
- Cubic
- Crystal habit
- Massive, Dendritic, Arborescent, Wire, Plates
- Cleavage
- None
- Rarity
- Common
- Uses
- Collector, Specimen, Industrial, Historical
- Host rock
- Basaltic Lavas, Sedimentary Conglomerates, Hydrothermal Veins
- Typical price
- $10-100 thumbnail, $200-2000 cabinet specimen
Where rockhounds find native copper
1 mapped spotsClassic worldwide localities
- Keweenaw Peninsula, Michigan, USA
- Tsumeb, Namibia
- Corocoro, Bolivia
- Dzhezkazgan, Kazakhstan
- Broken Hill, Australia
Field-hunting tip
Look in basaltic lavas, sedimentary conglomerates, hydrothermal veins country — that is the host setting where native copper typically forms. If you start seeing calcite, prehnite, datolite in float, you are in the right ground. Field specimens usually show a massive, dendritic, arborescent, wire, plates habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in California — start trip planning there.
Common questions
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Find native copper on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
