mineral

Peacock Ore (Chalcopyrite with acid treatment)

Copper Iron Sulfide (CuFeS2)

Hardness: 3.5-4 (Mohs); Color: Iridescent pink, purple, blue, and gold; Luster: Metallic; Crystal Structure: Tetragonal; Cleavage: Poor; Specific Gravity: 4.1-4.3

Hardness: 3
Color: Iridescent pink, purple, blue, and gold
Luster: Metallic

Identified June 21, 2026More mineral →

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Physical properties

Hardness: 3.5-4 (Mohs); Color: Iridescent pink, purple, blue, and gold; Luster: Metallic; Crystal Structure: Tetragonal; Cleavage: Poor; Specific Gravity: 4.1-4.3

Formation & geological history

Formed in hydrothermal veins and through contact metamorphism. While natural Bornite is often called peacock ore, most vibrant commercial specimens like this one are Chalcopyrite that has been acid-washed to induce colorful oxidation.

Uses & applications

Primarily a decorative collector's stone and used in metaphysical healing. Naturally occurring Chalcopyrite is the most important ore of copper.

Geological facts

Authentic Bornite tarnishes naturally, but the extreme neon pinks and purples seen in the image are usually produced by dipping Chalcopyrite in acid. It is named 'Peacock Ore' due to its resemblance to peacock feathers.

Field identification & locations

Identify by its bright metallic iridescence and relatively low hardness compared to steel. It is commonly found in copper-rich mining districts like those in Arizona, Mexico, and Cornwall. Collectors should look for the vibrant play of colors which does not rub off easily.

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