Chalcopyrite

Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has a brassy to golden yellow colour and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black. On exposure to air, chalcopyrite oxidises to a variety of oxides, hydroxides and sulfates.
Treated chalcopyrite are specimens that have been treated with acid to give them a blue and purple iridescence, which enhances their visual appeal. In nature the surface of chalcopyrite loses its metallic luster and brass-yellow color upon weathering. It tarnishes to a dull, gray-green color, but in the presence of acids the tarnish can develop a red to blue to purple iridescence.

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  • Chalcopyrite, Treated

    (May differ to photo) Sale! £2.64

    SIZE: 10-20mm (Range)

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  • Chalcopyrite

    (May differ to photo) Sale! £4.20

    SIZE: 35-65mm (Range)

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  • Chalcopyrite, Treated

    (Actual as seen) Sale! £4.20

    SIZE: 27 x 20 x 41mm
    (1.06 x 0.79 x 1.61 inches)

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  • Chalcopyrite

    (Actual as seen) Sale! £5.16

    SIZE:   52 x 46 x 18mm
    (2.05 x 1.81 x 0.71 inches)

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  • Chalcopyrite, Treated

    (Actual as seen) Sale! £41.64

    SIZE:  120 x 103 x 47mm
    (4.72 x 4.06 x 1.85 inches)

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  • Chalcopyrite, Treated

    (Actual as seen) Sale! £41.64

    SIZE:  90 x 85 x 56mm
    (3.54 x 3.35 x 2.2 inches)

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Showing all 6 results