Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Biotite from
Oplustilberg, Petrov nad Desnou, Šumperk District, Olomouc Region, Czech Republic


Locality type:Pegmatite
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 Oplustilberg, Petrov nad Desnou, Šumperk District, Olomouc Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:655164
Long-form Identifier:1:3:655164:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.1km (1.3 miles) ⓘAnenská studánka (Annaquelle), Petrov nad Desnou, Šumperk District, Olomouc Region, Czech Republic
2.2km (1.3 miles) ⓘPetrovský vrch, Petrov nad Desnou, Šumperk District, Olomouc Region, Czech Republic
3.1km (1.9 miles) ⓘRasovna (Schinderhübl), Maršíkov (Marchendorf), Velké Losiny, Šumperk District, Olomouc Region, Czech Republic
3.4km (2.1 miles) ⓘStřelecký důl (Scheibengraben), Maršíkov (Marchendorf), Velké Losiny, Šumperk District, Olomouc Region, Czech Republic
4.2km (2.6 miles) ⓘLysá hora (Kahlhübel), Maršíkov (Marchendorf), Velké Losiny, Šumperk District, Olomouc Region, Czech Republic
5.0km (3.1 miles) ⓘKrásné, Hraběšice, Šumperk District, Olomouc Region, Czech Republic
5.1km (3.1 miles) ⓘRudná hora, Vernířovice, Šumperk District, Olomouc Region, Czech Republic
5.9km (3.7 miles) ⓘKluč Hill, Loučná nad Desnou, Šumperk District, Olomouc Region, Czech Republic
6.3km (3.9 miles) ⓘŠvagrov, Vernířovice, Šumperk District, Olomouc Region, Czech Republic
6.9km (4.3 miles) ⓘKosaře, Vernířovice, Šumperk District, Olomouc Region, Czech Republic
References
Kruťa, T., Paděra, K., Pouba, Z., Sládek, R. (1968) Die Mineralienparagenese in dem Mittleren Teile des Altvatergebirge (Hrubý Jeseník, Hohes Gesenke, ČSSR). II. Acta Musei Moraviae, Scientiae naturales: 53: 5-80.
 
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