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Home » Minerals » Bornite

Bornite


Mineral Properties and Uses



What is Bornite?



Bornite is a copper iron sulfide mineral commonly found in hydrothermal veins, contact metamorphic rocks and in the enriched zone of sulfide copper deposits. It is a common ore of copper and is easily recognized because it tarnishes to iridescent shades of blue, purple, green and yellow. It is often mined as an ore of copper.


Physical Properties of Bornite

Chemical Classification sulfide
Color brownish bronze on a fresh surface, iridescent purple, blue, and black on a tarnished surface
Streak grayish black
Luster metallic
Diaphaneity opaque
Cleavage poor
Mohs Hardness 3
Specific Gravity 5.0 to 5.1
Diagnostic Properties color
Chemical Composition copper iron sulfide, Cu5FeS4
Crystal System tetragonal
Uses Primarily an ore of copper.


South African Bornite
Bornite from Musina, South Africa. Specimen is approximately 3/4 inch (1.9 centimeters) across.




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Bornite
Bornite from Butte, Montana. Specimen is approximately 4 inches (10 centimeters) across.




Bornite with Iridescent tarnish
Bornite from Musina, South Africa. Specimen on the right shows the typical iridescent tarnish. Specimens are approximately 1 inch (2.5 centimeters) across.


Mineral Information
 Anhydrite
 Apatite
 Arsenopyrite
 Augite
 Azurite

 Barite
 Bauxite
 Beryl
 Biotite
 Bornite

 Calcite
 Cassiterite
 Chalcocite
 Chalcopyrite
 Chlorite
 Chromite
 Chrysoberyl
 Cinnabar
 Clinozoisite
 Copper
 Cordierite
 Corundum
 Cuprite
 Diamond
 Diopside
 Dolomite

 Enstatite
 Epidote

 Fluorite

 Galena
 Garnet
 Glauconite
 Gold
 Graphite
 Gypsum

 Halite
 Hematite
 Hornblende

 Ilmenite

 Jadeite

 Kyanite
 Limonite

 Magnesite
 Magnetite
 Malachite
 Marcasite
 Molybdenite
 Monazite
 Muscovite

 Nepheline
 Nephrite

 Olivine
 Orthoclase

 Plagioclase
 Prehnite
 Pyrite
 Pyrophyllite
 Pyrrhotite

 Quartz

 Rhodochrosite
 Rhodonite
 Rutile
 Scapolite
 Serpentine
 Siderite
 Sillimanite
 Silver
 Sodalite
 Sphalerite
 Spinel
 Spodumene
 Staurolite
 Sulfur
 Sylvite

 Talc
 Titanite
 Topaz
 Tourmaline
 Turquoise

 Uraninite

 Witherite
 Wollastonite

 Zircon
 Zoisite


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