mineral
Peacock Ore
Bornite (Cu5FeS4)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, metallic luster, and distinctive iridescent purple, blue, and green tarnish. It has a specific gravity of 4.9 to 5.3 and an isometric crystal system.
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Physical properties
Hardness of 3 on the Mohs scale, metallic luster, and distinctive iridescent purple, blue, and green tarnish. It has a specific gravity of 4.9 to 5.3 and an isometric crystal system.
Formation & geological history
Forms in hydrothermal veins and copper ore deposits through the crystallization of copper-iron sulfides. Found globally in association with other copper minerals.
Uses & applications
Used primarily as an important copper ore in industry and valued as a colorful specimen by mineral collectors.
Geological facts
Natural freshly broken bornite is actually brownish-bronze with a metallic luster, but rapidly tarnishes to its iconic iridescent colors when exposed to air.
Field identification & locations
Identify by its soft nature, high density, and vibrant rainbow tarnish. Commonly found in major copper-producing regions worldwide.
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