Sphalerite, Bornite, Chalcopyrite
Pave York Mine, Greenburn Valley, Coniston, South Lakeland, Cumbria, England, UK
Reflected light digital image (from transparency) illustrating crystallographically controlled replacement of sphalerite by a complex intergrowth of bornite and chalcopyrite. Late replacement along fractures by bluish covellite and other copper minerals has also occured.
Specimen collected in 1976 for PhD thesis. Mineralogical studies of ...
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