Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Native Copper from
Henwood Mine (Douglass Houghton Mine), Winona, Greenland Township, Ontonagon County, Michigan, USA


Locality type:Mine
Classification
Species:Native Copper
Formula:Cu
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Native Copper data
Locality Data:Click here to view Henwood Mine (Douglass Houghton Mine), Winona, Greenland Township, Ontonagon County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:306172
Long-form Identifier:1:3:306172:5
GUID (UUID V4):0
Nearest other occurrences of Native Copper
1.3km (0.8 miles) ⓘWhat Cheer Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA
1.7km (1.1 miles) ⓘFiresteel Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA
2.2km (1.4 miles) ⓘIndiana Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA
3.2km (2.0 miles) ⓘCherokee Mine (Cherokee Penn Mine; Dunn Mine), Winona, Greenland Township, Ontonagon County, Michigan, USA
4.5km (2.8 miles) ⓘAlgonquin Mine (Pennsylvania Mine), Ontonagon County, Michigan, USA
4.8km (3.0 miles) ⓘNorth Lake Mine, Ontonagon County, Michigan, USA
6.1km (3.8 miles) ⓘBelt Mine (Piscatauqua), Mass City, Ontonagon County, Michigan, USA
6.9km (4.3 miles) ⓘSouth Lake Mine (Aztec Mine), Mass City, Ontonagon County, Michigan, USA
6.9km (4.3 miles) ⓘLake Mine (Great Western Mine; Bohemian), Mass City, Ontonagon County, Michigan, USA
6.9km (4.3 miles) ⓘToltec Mine, Mass City, Ontonagon County, Michigan, USA
References
Rocks & Minerals 80:3, 154-177
Henwood, William Jory (1871) On the Native Copper of Lake Superior, in Observations of Metalliferous Deposits, and on Subterranean Temperature - Part the First. Transactions of the Royal Geological Society of Cornwall, 8 (1). 385-489
 
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