mineral

Copper Ore

Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)

Hardness: 2.5-3.0; Color: reddish-orange (bright) to brownish-black (weathered); Luster: metallic; Crystal Structure: Isometric; Cleavage: none; SG: 8.9

Hardness: 2
Color: reddish-orange (bright) to brownish-black (weathered)
Luster: metallic

Identified June 7, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 2.5-3.0; Color: reddish-orange (bright) to brownish-black (weathered); Luster: metallic; Crystal Structure: Isometric; Cleavage: none; SG: 8.9

Formation & geological history

Formed in hydrothermal veins and primary basalt flows as a secondary mineral. Often associated with the enrichment zones of copper deposits in Precambrian basaltic lavas.

Uses & applications

Primary source of copper used in electrical wiring, electronics, plumbing, coinage, and as an alloy for bronze and brass. Notable for mineral collectors when found in crystalline form.

Geological facts

Native copper was the first metal to be worked by humans over 10,000 years ago. Its high conductivity makes it essential for the modern power grid.

Field identification & locations

Identified by its high density, metallic luster on fresh surfaces, and characteristic green or blue oxidation (malachite/azurite patina). Found commonly in the Keweenaw Peninsula, Michigan, and copper mines in Chile and Arizona.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic