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PhotosCopper - Williams Stone Quarry, Goonhilly Downs, Mawgan-in-Meneage, Lizard Peninsula, Cornwall, England, UK

10th Apr 2016 20:43 UTCP. Jones

03538420015696869038838.jpg



Do you have any idea what the yellow mineralization is on your specimen? I have a piece from Houghton County, Michigan, with roughly the same mineralization, but have been unsuccessful in finding a similar looking piece until yours.


Thank you! ~Paul

10th Apr 2016 23:10 UTCPaul Brandes 🌟 Manager

Is the photo you have attached Paul the specimen from Houghton Co.? If so, it could be pumpellyite, but the yellow phase of pumpellyite in the Keweenaw is quite rare, especially as a coating on native copper. I would highly recommend getting an XRD analysis of the material to see what you have.
 
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