Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Pumpellyite Subgroup from
Mount Bohemia Mine, Mount Bohemia, Lac La Belle, Grant Township, Keweenaw County, Michigan, USA


Locality type:Mine
Classification
Species:'Pumpellyite Subgroup' (not an IMA approved species)
Formula:Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pumpellyite Subgroup data
Locality Data:Click here to view Mount Bohemia Mine, Mount Bohemia, Lac La Belle, Grant Township, Keweenaw County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:656060
Long-form Identifier:1:3:656060:7
GUID (UUID V4):0
Nearest other occurrences of Pumpellyite Subgroup
3.9km (2.4 miles) ⓘMedora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
7.4km (4.6 miles) ⓘDelaware Mine (Delaware Conglomerate Mine), Delaware, Grant Township, Keweenaw County, Michigan, USA
13.0km (8.1 miles) ⓘClark Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
13.6km (8.4 miles) ⓘNorthwestern Mine, Central, Houghton Township, Keweenaw County, Michigan, USA
14.0km (8.7 miles) ⓘCentral No. 2 shaft, Central Mine, Central, Houghton Township, Keweenaw County, Michigan, USA
14.1km (8.8 miles) ⓘCentral Mine, Central, Houghton Township, Keweenaw County, Michigan, USA
19.2km (11.9 miles) ⓘSt. Clair Mine, Phoenix, Houghton Township, Keweenaw County, Michigan, USA
21.4km (13.3 miles) ⓘEagle River, Houghton Township, Keweenaw County, Michigan, USA
22.7km (14.1 miles) ⓘAvery shaft, Cliff Mine, Allouez Township, Keweenaw County, Michigan, USA
27.0km (16.8 miles) ⓘIroquois Mine, Seneca, Allouez Township, Keweenaw County, Michigan, USA
References
Bornhorst, Theodore J., Rose, William I. (1994) Self-guided geological field trip to the Keweenaw Peninsula, Michigan. Proceedings, 40 (2). Institute on Lake Superior Geology. 1-185
 
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