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Copper on Prehnite
Copper on Prehnite Copper on Prehnite Copper on Prehnite
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Copper on Prehnite (Ref: AU621)

Michigan Mine, Ontonagon County, Michigan, USA
50mm x 35mm x 35mm
$260
Copper crystals on green Prehnite lining a vug in basalt. The largest Copper crystal is 1.1cm tall. This is possibly from Osceola Mine, but comes with an old label stating the Michigan Mine.
Data last checked on 14th Sep 2025 - specimen may no longer be available

From: Marin Minerals
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See Also

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Copper, Copper in Calcite
Quincy Mine, Houghton Co., Michigan, USA
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Copper
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$260
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Silver on Copper
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Cuprite on Copper
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Copper ( spinel twin )
Ray Mine, Ray District, near Kearney, Dripping Springs Mts., Pinal County, Arizona, USA
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Copper
Hekla Mine, Houghton Co., Michigan, USA
$475
75mm x 65mm x 36mm
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Copper
Keweenaw Peninsula, Michigan, USA
$375
60mm x 45mm x 16mm
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Copper (twinned)
1740 Bench, Pearl Handle Pit, Ray Mine, Pinal County, Arizona , USA
$400
30mm x 10mm x 10mm
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Copper
Keweenaw Peninsula, Michigan, USA
$400
150mm x 90mm x 75mm
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* price is an approximate conversion and may not be accurate.

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