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


Locality type:Mine
Classification
Species:Anhydrite
Formula:CaSO4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Anhydrite data
Locality Data:Click here to view Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:732
Long-form Identifier:1:3:732:2
GUID (UUID V4):0
Localities for Anhydrite in this Region
Isle Royal No. 4 shaft, Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
Isle Royal No. 5 shaft, Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
Isle Royal No. 6 shaft, Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
Nearest other occurrences of Anhydrite
0.0km (0.0 miles) ⓘIsle Royal No. 4 shaft, Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
0.6km (0.4 miles) ⓘIsle Royal No. 5 shaft, Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
1.0km (0.6 miles) ⓘHuron Mine (Houghton Mine), Houghton, Houghton County, Michigan, USA
1.2km (0.7 miles) ⓘIsle Royal No. 6 shaft, Isle Royal Mines, Portage Township, Houghton County, Michigan, USA
36.6km (22.7 miles) ⓘCliff Mine, Allouez Township, Keweenaw County, Michigan, USA
54.0km (33.5 miles) ⓘMass Mine, Mass Consolidated Mine, Mass City, Ontonagon County, Michigan, USA
79.5km (49.4 miles) ⓘChampion Mine, Champion, Champion Township, Marquette County, Michigan, USA
References
Wilson, Marc L., II, Stanley J. Dyl (1992) The Michigan Copper Country. The Mineralogical Record, 23 (2) 1-76
 
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