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
Dubová calcsilicate outcrops, Dubová, Pezinok District, Bratislava Region, Slovakia


Locality type:Outcrop
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 Dubová calcsilicate outcrops, Dubová, Pezinok District, Bratislava Region, Slovakia
Data Identifiers
Mindat Occurrence Record ID:409302
Long-form Identifier:1:3:409302:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘDolinkovský hill, Modra, Pezinok District, Bratislava Region, Slovakia
1.7km (1.1 miles) ⓘHarmónia, Modra, Pezinok District, Bratislava Region, Slovakia
8.7km (5.4 miles) ⓘFerdinand and Augustín Mine, Pezinok, Pezinok District, Bratislava Region, Slovakia
10.0km (6.2 miles) ⓘKrížnica deposit, Pernek, Malacky District, Bratislava Region, Slovakia
11.0km (6.8 miles) ⓘLimbach Brook, Limbach, Pezinok District, Bratislava Region, Slovakia
20.6km (12.8 miles) ⓘBorinka quarry, Stupava, Malacky District, Bratislava Region, Slovakia
28.5km (17.7 miles) ⓘCalvary (Okánikova street), Staré Mesto, Bratislava I, Bratislava, Bratislava Region, Slovakia
30.2km (18.7 miles) ⓘŠvábsky hill, Dúbravka, Bratislava IV, Bratislava, Bratislava Region, Slovakia
76.2km (47.4 miles) ⓘBučník Hill Quarry, Komňa, Uherské Hradiště District, Zlín Region, Czech Republic
77.3km (48.0 miles) ⓘZlaté Moravce-1 well, Zlaté Moravce, Zlaté Moravce District, Nitra Region, Slovakia
References
Koděra, Miroslav; Kolektív, A. (1986) Topografická mineralógia Slovenska. Veda Vydavatel'stvo.
 
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