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Cogwheels of bournonite are up against colourful vesuvianite.
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Biotite from
Katahdin Iron Works Mine, Katahdin Iron Works, Piscataquis County, Maine, USA


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Katahdin Iron Works Mine, Katahdin Iron Works, Piscataquis County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:771644
Long-form Identifier:1:3:771644:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
77.0km (47.8 miles) ⓘRobinson Mine, Concord, Somerset County, Maine, USA
80.6km (50.1 miles) ⓘCatheart Mountain locality, Bradstreet, Somerset County, Maine, USA
88.6km (55.1 miles) ⓘGetchell Mountain pegmatite prospect, Lakeville, Penobscot County, Maine, USA
90.3km (56.1 miles) ⓘBear Pond Road Locality, T3 R5 BKP WKR, Somerset County, Maine, USA
98.9km (61.4 miles) ⓘRapid Stream, Mount Abram, Franklin County, Maine, USA
99.3km (61.7 miles) ⓘMosquito Mountain Granite Quarry, Frankfort, Waldo County, Maine, USA
References
Houston, Robert S., 1956, Genetic Study of Some Pyrrhotite Deposits of Maine and New Brunswick, Department of Development of Industry and Commerce, Augusta, Maine, pp. 117 + 6 plates.
 
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