Polished Copper nodule

Phoenix Mine, Keweenaw Co., Michigan
Small Cabinet, 6.6 x 4.2 x 3.7 cm
Start Time: 07/22/2010 6:30:00 pm (CDT)
End Time: 07/29/2010 6:30:00 pm (CDT)
Auction Closed

Item Description

A showy, old-time and unusual copper specimen from the famous Phoenix Mine of Michigan. This is a sliced and polished copper nodule included with quartz. Molten copper with quartz dissolved and replaced a conglomerate cobble leaving the shape of the cobble. The Phoenix Mine was mainly a fissure mine, but it also worked the nearby Ashbed amygdaloid. This piece is related to the well-known Michigan copper "skulls". Super-rich copper ore! Hefty at 303 grams.

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