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
Waupaca granite quarry, Waupaca County, Wisconsin, USA


Locality type:Quarry
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 Waupaca granite quarry, Waupaca County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:243171
Long-form Identifier:1:3:243171:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
23.1km (14.4 miles) ⓘDupont uranium claims, Waupaca County, Wisconsin, USA
26.5km (16.5 miles) ⓘKeller Lake pegmatite, Waupaca County, Wisconsin, USA
35.6km (22.1 miles) ⓘBeryl mine, Tigerton, Shawano County, Wisconsin, USA
41.4km (25.7 miles) ⓘStevens Point, Portage County, Wisconsin, USA
43.6km (27.1 miles) ⓘTigerton anorthosite outcrops, Tigerton, Shawano County, Wisconsin, USA
63.3km (39.3 miles) ⓘTork and Haessley Company quarries, Wisconsin Rapids, Wood County, Wisconsin, USA
71.7km (44.6 miles) ⓘMontello Granite Quarry (Montello Granite Company; Inc.), Marquette County, Wisconsin, USA
73.8km (45.8 miles) ⓘBeilke Quarry, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
74.0km (46.0 miles) ⓘKoss pit, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
82.3km (51.1 miles) ⓘCounty road U road cut, Stettin pluton, Wausau Intrusive Complex, Marathon 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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