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Copper with Silver

#PD30616
SOLD
Copper from Kearsarge mine, Houghton Co., Michigan, United States - PD30616
Copper from Kearsarge mine, Houghton Co., Michigan, United States - PD30616

Copper with Silver

#PD30616
Availability
Sold
Size
11 x 6 x 6 cm - Cabinet 
Formula
Cu (RRUFF)
Locality
Kearsarge mine, Houghton Co., Michigan, United States
Tagged
Ore Minerals

Large Copper mass from amygdaloidal basalts. This specimen also contains a bit of Silver. Well over 6 million tons of native Copper has been mined from these deposits which stretch the entire length of upper Michigan from Wisconsin to Keweenaw point. The Copper occurs within open-space fillings and replacements in amygdaloidal flow tops of the Portage Lake Lava Series. These Copper deposits has been mined since prehistoric times.

Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Phillips Collection
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