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.




Find it on Geology.com




More from Geology.com


Tumbled Stones
Tumbled Stones: A bag of tumbled stones is like a colorful rock collection.
Ant Hill Garnets
Ant Hill Garnets - tiny garnets that ants haul to the surface and discard on their anthill.
tumbled stones
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler.
Homeowners Insurance
Homeowners Insurance usually does not cover the most common geologic hazards.
Deepest Lake in the World
Deepest Lake in the World: Lake Baikal in southern Russia is the deepest lake in the World.
Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
wall maps
Wall Maps - World maps, United States maps, continent maps, maps of individual states.
Turritella Agate
Turritella Agate is a brown agate containing snail fossils from the Green River Formation.


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.


More Minerals
  Rock, Mineral and Fossil Collections.
  Mohs Hardness Scale
  Tourmaline
  Calcite
  Diamond
  The Acid Test
  Topaz
  Minerals






© 2005-2016 Geology.com. All Rights Reserved.
Images, code, and content on this website are property of Geology.com and are protected by copyright law.
Geology.com does not grant permission for any use, republication, or redistribution.
Images, code and content owned by others are marked on the pages where they appear.