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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Sillimanite from
Ahornberg, Bärnau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany


Locality type:Mountain
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Ahornberg, Bärnau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
Data Identifiers
Mindat Occurrence Record ID:101686
Long-form Identifier:1:3:101686:4
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
13.6km (8.4 miles) ⓘDyleň, Stará Voda, Cheb District, Karlovy Vary Region, Czech Republic
14.4km (9.0 miles) ⓘBayerland mine, Pfaffenreuth, Leonberg, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
16.9km (10.5 miles) ⓘZadní Chodov deposit (Hinterkotten deposit), Zadní Chodov, Tachov District, Plzeň Region, Czech Republic
18.4km (11.4 miles) ⓘBrünst Quarry, Leßlohe, Georgenberg, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
20.5km (12.7 miles) ⓘBasalt works, Triebendorf, Wiesau, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
21.3km (13.2 miles) ⓘMiesbrunn pegmatite–aplite swarm, Pleystein, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
22.2km (13.8 miles) ⓘUnnamed placers, Pleystein, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
23.2km (14.4 miles) ⓘGroßer Teichelberg (Teichelberg; Teichlberg), Pechbrunn, Tirschenreuth District, Upper Palatinate, Bavaria, Germany
23.5km (14.6 miles) ⓘKTB borehole (KTB pilot hole), Windischeschenbach, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
23.6km (14.7 miles) ⓘSilbergrube, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
References
Laubmann, H.; Steinmetz, H. (1915) Phosphatführende Pegmatite des Oberpfälzer und Bayerischen Waldes. Zeitschrift für Kristallographie, Mineralogie und Petrographie, 55 (1-6). 523-586 doi:10.1524/zkri.1915.55.1.523
 
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