|Mineral class||Sulphides : Chalkopyrite - bornite group|
|Chemical formula||Cu5FeS4 -->|
|Habitus||Crystals rare. Often as compact grainy masses.|
|Cleavage|| very poor, octahedral, fracture conchoidal.|
|Density||4.9 - 5.3|
|Color||Reddish bronze, purple, opaque.|
|Description||Bornite is an important copper ore.|
|Occurance||In igneous rocks, pegmatites, hydrothermal veins. Also in the oxidation zones of copper deposits together with malachite.|
Often gets a bluish tarnish on exposed surfaces.|
Easily soluble in acids.
Named after the Austrian mineralogist, I. von Born (1742-1791).
Approved by IMA in 1960.
Also known as "Brokig kopparmalm".
|Localities|| A common mineral in many copper deposits |
| To sulphides index.
|| Mineral group index.
If you have some questions, suggestions or comments you are welcome to write me a line or two.