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, so Native Copper leaves copper-red, Nickeline leaves brownish-black.
How to tell apart: Streak differs, so 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, 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.
