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
Seven Mile Point, Allouez Township, Keweenaw County, Michigan, USA


Locality type:Point
Classification
Species:'Thomsonite Subgroup' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Thomsonite Subgroup data
Locality Data:Click here to view Seven Mile Point, Allouez Township, Keweenaw County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:417192
Long-form Identifier:1:3:417192:8
GUID (UUID V4):0
Nearest other occurrences of Thomsonite Subgroup
4.4km (2.7 miles) ⓘFive Mile Point, Allouez Township, Keweenaw County, Michigan, USA
10.8km (6.7 miles) ⓘKearsarge, Calumet Township, Houghton County, Michigan, USA
11.8km (7.4 miles) ⓘTamarack Waterworks Beach, Calumet Township, Houghton County, Michigan, USA
16.5km (10.3 miles) ⓘNo. 2 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
16.8km (10.4 miles) ⓘNo. 3 shaft, Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA
17.6km (10.9 miles) ⓘAshbed Mine, Copper Falls, Eagle Harbor Township, Keweenaw County, Michigan, USA
36.8km (22.8 miles) ⓘSouth Range Quarry, South Range, Adams Township, Houghton County, Michigan, USA
38.1km (23.7 miles) ⓘBaltic No. 2 shaft, Baltic Mine, Baltic, Adams Township, Houghton County, Michigan, USA
38.9km (24.2 miles) ⓘLakeshore traps, Eagle Harbor Township, Keweenaw County, Michigan, USA
41.4km (25.8 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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