McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams

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


The Largest Tsunami!
The Largest Tsunami! The tsunami with the highest run-up was in Lituya Bay, Alaska.
rocks
Rock Gallery: Photos of igneous, sedimentary and metamorphic rocks.
Novarupta
Wrong Volcano! The most powerful eruption of the 20th century was misidentified?
Sliding Rocks
Sliding Rocks Mystery: What causes these rocks to slide across a Death Valley playa?
Gems from Space
Gems from Space A number of materials from space have been used as attractive gems.
Opal
Pictures of Opal: A collection of different types of opal from all around the world and Mars too!
Garnet
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
city satellite images
What City is This? Can you recognize United States cities from satellite images?


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
  Fluorescent Minerals
  Minerals
  The Acid Test
  Corundum
  Mineral Identification Chart
  Rhodochrosite
  Quartz
  Rhodonite




© 2005-2014 Geology.com. All Rights Reserved.
Images, code and content of this website are property of Geology.com. Use without permission is prohibited. Pages on this site are protected by Copyscape.