RockVault
Native Copper

Native Copper

Image: <ul><li><a href="//commons.wikimedia.org/wiki/File:Native_Copper_Macro_Digon3.jpg" title="File:Native Copper Macro Digon3.jpg">Native_Copper_Macro_Digon3.jpg</a>: “Jonathan Zander (<a href="//commons.wikimedia.org/wiki/User:Digon3" title="User:Digon3">Digon3</a>)"</li> <li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Materialscientist" title="User:Materialscientist">Materialscientist</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Materialscientist" title="User talk:Materialscientist"><span class="signature-talk">talk</span></a>)</li></ul> (CC BY-SA 3.0)

Mineral NameNative Copper
Chemical FormulaCu
Mohs Hardness2.5
Crystal Systemcubic
Lustermetallic
Streak Colorcopper-red
Cleavagenone
Fracturehackly
Specific Gravity8.9
Colorscopper-red, reddish-brown, tarnished dark brown, green
Transparencyopaque
Type LocalityKeweenaw Peninsula, Michigan, USA
Mineral GroupNative Elements
Useselectrical conductor, coinage, plumbing, jewelry, collector
Associated Mineralscuprite, malachite, azurite, chalcocite, calcite, epidote, quartz, silver
Rarityuncommon

Description

This image displays a roughly 4 cm specimen of native copper, characterized by its intricate, dendritic or arborescent habit and a bright, reddish-brown metallic luster.

Geological Context

Native copper forms in the oxidized zones of copper ore deposits, in basaltic lavas where hydrothermal fluids have deposited it, and sometimes in sedimentary rocks. It is often found in amygdaloidal basalts.

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