| CONGLOMERATE NATIVE SILVER: CALUMET & HECLA MINES, HOUGHTON CO. MICHIGAN - NR! | |
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Description: So often you will see native copper and much rarer native silver that grew around these pebbles and showing ancient voids where the pebbles fell out during blasting and extraction in the mine. There are small areas of reddish-brown you can see on the piece that at first glance you might think was copper.Winning Bid: USD $32.97 - 12 bids (Year Sold: 2020 ) |
Found near: Calumet, Michigan United States
Approx/Nearest City GPS Coordinates (Lat, Long): (47.271841, -88.426269)
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