Name:

bornite

A photo of the mineral bornite

Class:

Sulfides

Chemistry:

Cu5FeS4

Color(s):

copper-red, bronze-brown, tarnishes to deep blue-violet ... metallic

Hardness:

3

SpecGrav:

4.9-5.1

Fracture:

uneven brittle

Cleavage:

none

Crystal:

isometric - crystals rare ... cubic, dodecahedral, octahedral

Envronment:

can occur with carbonatites or in hydrothermal veins, and with other ores

Association:

calcite, barite, galena, quartz, chalcopyrite, chalcocite, pyrite

Locals:

CO, MN, AR, USA / Canada / Morocco / Germany / Poland / England / Chile

Misc:

It was named after Ignaz vonBorn (1742-1791), mineralogist.

Photos
& Locals:

1.) Dzhezkazgan, Kazakhstan
2.) Dzhezkazgan, Kazakhstan

3.) Dzhezkazgan, Kazakhstan

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