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
Gloriette Quarry, Sopron, Győr-Moson-Sopron County, Hungary


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 Gloriette Quarry, Sopron, Győr-Moson-Sopron County, Hungary
Data Identifiers
Mindat Occurrence Record ID:295654
Long-form Identifier:1:3:295654:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.7km (0.5 miles) ⓘDeák-kút Quarry, Sopron, Győr-Moson-Sopron County, Hungary
1.8km (1.1 miles) ⓘVárisi Quarry, Sopron, Győr-Moson-Sopron County, Hungary
3.0km (1.9 miles) ⓘKő-bérc, Sopron, Győr-Moson-Sopron County, Hungary
3.1km (1.9 miles) ⓘUltra Hill, Sopron, Győr-Moson-Sopron County, Hungary
4.7km (2.9 miles) ⓘHarkai Hill, Harka, Győr-Moson-Sopron County, Hungary
6.0km (3.7 miles) ⓘKő hill quarry, Kópháza, Győr-Moson-Sopron County, Hungary
18.9km (11.8 miles) ⓘBasalt quarry, Pauliberg, Markt Sankt Martin, Oberpullendorf District, Burgenland, Austria
28.0km (17.4 miles) ⓘIron mines, Pitten, Neunkirchen District, Lower Austria, Austria
58.0km (36.0 miles) ⓘLöffelbachgraben (Puchegg), Vorau, Hartberg-Fürstenfeld District, Styria, Austria
64.6km (40.1 miles) ⓘSág Hill, Celldömölk, Celldömölk District, Vas County, Hungary
References
Szakáll & Jánosi. Minerals of Hungary, 1995
 
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