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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Biotite from
Kempster, Langlade County, Wisconsin, USA


Locality type:Unincorporated Community
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 Kempster, Langlade County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:242542
Long-form Identifier:1:3:242542:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
45.9km (28.5 miles) ⓘRuby Red Quarry (Anderson Brothers & Johnson Company), Maine, Marathon County, Wisconsin, USA
48.5km (30.1 miles) ⓘGrandfather Dam, Lincoln County, Wisconsin, USA
54.5km (33.9 miles) ⓘTigerton anorthosite outcrops, Tigerton, Shawano County, Wisconsin, USA
55.2km (34.3 miles) ⓘCounty road U road cut, Stettin pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
61.0km (37.9 miles) ⓘBeilke Quarry, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
62.7km (39.0 miles) ⓘBeryl mine, Tigerton, Shawano County, Wisconsin, USA
67.6km (42.0 miles) ⓘKoss pit, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
68.3km (42.4 miles) ⓘRitchie Creek deposit, Ritchie Creek, Spirit, Price County, Wisconsin, USA
72.9km (45.3 miles) ⓘKeller Lake pegmatite, Waupaca County, Wisconsin, USA
76.9km (47.8 miles) ⓘDupont uranium claims, Waupaca County, Wisconsin, USA
References
Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078
 
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