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Nanisivik Pyrite (crystalline pseudomorph after marcasite) | by subarcticmike
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Nanisivik Pyrite (crystalline pseudomorph after marcasite)

A display specimen with interesting morphology from the now-abandoned Nanisivik Mine. Cabinet-sized chunk of pyrite replacing marcasite at the University of Manitoba, Winnipeg, Canada. Geotagging shows the specimen's original location in Nunavut Canada.

 

More on these mineral changelings :

en.wikipedia.org/wiki/Pseudomorph

 

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Taken on September 21, 2009