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
Dupont uranium claims, Waupaca County, Wisconsin, USA


Locality type:Claim
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 Dupont uranium claims, Waupaca County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:243181
Long-form Identifier:1:3:243181:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.0km (2.5 miles) ⓘKeller Lake pegmatite, Waupaca County, Wisconsin, USA
14.2km (8.9 miles) ⓘBeryl mine, Tigerton, Shawano County, Wisconsin, USA
22.3km (13.9 miles) ⓘTigerton anorthosite outcrops, Tigerton, Shawano County, Wisconsin, USA
23.1km (14.4 miles) ⓘWaupaca granite quarry, Waupaca County, Wisconsin, USA
50.2km (31.2 miles) ⓘStevens Point, Portage County, Wisconsin, USA
66.4km (41.3 miles) ⓘBeilke Quarry, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
68.7km (42.7 miles) ⓘKoss pit, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
72.9km (45.3 miles) ⓘCounty road U road cut, Stettin pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
74.1km (46.1 miles) ⓘTork and Haessley Company quarries, Wisconsin Rapids, Wood County, Wisconsin, USA
76.9km (47.8 miles) ⓘKempster, Langlade 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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