| CONGLOMERATE SILVER & COPPER: 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. Here is a sweet example of native silver and copper from one of the best localities on the planet for these two minerals growing in combination.Winning Bid: USD $15.5 - 4 bids (Year Sold: 2020 ) |
Found near: Calumet, Michigan United States
Approx/Nearest City GPS Coordinates (Lat, Long): (, )
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