mineral
Peacock Ore
Bornite (Cu5FeS4)
AI-generated identification · may be incorrectHardness 3 on the Mohs scale, metallic luster, and a distinctive iridescent tarnish ranging from purple and blue to green and gold. It has a tetragonal crystal system and a dark grayish-black streak.
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Physical properties
Hardness 3 on the Mohs scale, metallic luster, and a distinctive iridescent tarnish ranging from purple and blue to green and gold. It has a tetragonal crystal system and a dark grayish-black streak.
Formation & geological history
Forms in hydrothermal veins and copper ore deposits through the combination of copper, iron, and sulfur at elevated temperatures.
Uses & applications
Primarily mined as a minor ore of copper and widely sold as popular mineral specimens for collectors.
Geological facts
Natural freshly broken bornite is brownish-bronze; the vibrant peacock colors develop rapidly upon exposure to air due to oxidation.
Field identification & locations
Easily identified by its colorful peacock-like iridescence and softness. Commonly sourced from localities in Mexico, Peru, and the USA.
