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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Thomsonite Subgroup from
No. 2 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA


Locality type:Shaft
Classification
Species:'Thomsonite Subgroup' (not an IMA approved species)
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Thomsonite Subgroup data
Locality Data:Click here to view No. 2 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:417787
Long-form Identifier:1:3:417787:6
GUID (UUID V4):0
Nearest other occurrences of Thomsonite Subgroup
0.3km (0.2 miles) ⓘNo. 3 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
6.5km (4.0 miles) ⓘKearsarge, Calumet Township, Houghton County, Michigan, USA
7.6km (4.7 miles) ⓘTamarack Waterworks Beach, Calumet Township, Houghton County, Michigan, USA
16.5km (10.3 miles) ⓘSeven Mile Point, Allouez Township, Keweenaw County, Michigan, USA
19.8km (12.3 miles) ⓘFive Mile Point, Allouez Township, Keweenaw County, Michigan, USA
21.4km (13.3 miles) ⓘSouth Range Quarry, South Range, Adams Township, Houghton County, Michigan, USA
22.4km (13.9 miles) ⓘBaltic No. 2 shaft, Baltic Mine, Baltic, Adams Township, Houghton County, Michigan, USA
29.7km (18.4 miles) ⓘAshbed Mine, Copper Falls, Eagle Harbor Township, Keweenaw County, Michigan, USA
49.0km (30.4 miles) ⓘLakeshore traps, Eagle Harbor Township, Keweenaw County, Michigan, USA
51.0km (31.7 miles) ⓘCopper Harbor, Grant Township, Keweenaw County, Michigan, USA
References
Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
 
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