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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Chalcocite from
Isle Royal Mines, Portage Township, Houghton County, Michigan, USA


Locality type:Mine
Classification
Species:Chalcocite
Formula:Cu2S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcocite data
Locality Data:Click here to view Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:70186
Long-form Identifier:1:3:70186:2
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
2.2km (1.4 miles) ⓘPortage Mine (Grand Portage Mine), Houghton, Houghton County, Michigan, USA
2.8km (1.7 miles) ⓘSuperior Mine (Old Superior Mine), Superior, Portage Township, Houghton County, Michigan, USA
4.5km (2.8 miles) ⓘBaltic Mine, Baltic, Adams Township, Houghton County, Michigan, USA
5.8km (3.6 miles) ⓘBaltic No. 2 shaft, Baltic Mine, Baltic, Adams Township, Houghton County, Michigan, USA
6.5km (4.0 miles) ⓘArcadian No. 2 shaft, Arcadian Mine, Ripley, Franklin Township, Houghton County, Michigan, USA
6.6km (4.1 miles) ⓘSix Mile Hill, Adams Township, Houghton County, Michigan, USA
7.3km (4.5 miles) ⓘTrimountain Mine, Trimountain, Adams Township, Houghton County, Michigan, USA
9.2km (5.7 miles) ⓘChampion Mine, Champion Mine, Adams Township, Houghton County, Michigan, USA
14.8km (9.2 miles) ⓘLa Salle Mine, Osceola Township, Houghton County, Michigan, USA
16.2km (10.0 miles) ⓘLaurium Mine, Osceola Township, Houghton County, Michigan, USA
References
Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.109
 
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