mineral
Peacock Ore (Treated Chalcopyrite)
Copper Iron Sulfide (CuFeS2) coated with oxides
Hardness: 3.5 - 4 on the Mohs scale. Color: Iridescent blue, purple, green, and gold. Luster: Metallic. Crystal Structure: Tetragonal. Specific Gravity: 4.1 - 4.3.
- Hardness
- 3
- Color
- Iridescent blue, purple, green, and gold
- Luster
- Metallic
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Physical properties
Hardness: 3.5 - 4 on the Mohs scale. Color: Iridescent blue, purple, green, and gold. Luster: Metallic. Crystal Structure: Tetragonal. Specific Gravity: 4.1 - 4.3.
Formation & geological history
Formed in hydrothermal veins and sedimentary deposits. The vibrant peacock coloration is typically produced by treating natural chalcopyrite with acid to create a thin oxide tarnish layer.
Uses & applications
Popular as a mineral specimen for collectors, used in ornamental displays, and sometimes utilized in metaphysical practices.
Geological facts
Natural chalcopyrite is brass-yellow, but it tarnishes rapidly when exposed to air. The striking rainbow colors seen on commercial specimens are enhanced through artificial acid treatment.
Field identification & locations
Easily identified by its brilliant metallic iridescent colors, relatively soft hardness, and heavy weight relative to its size. Commonly sourced from Mexico and Peru.
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