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
Březina pegmatite, Moldanubian Zone pegmatites, Vlastějovice, Kutná Hora District, Central Bohemian 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 Březina pegmatite, Moldanubian Zone pegmatites, Vlastějovice, Kutná Hora District, Central Bohemian Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:1241387
Long-form Identifier:1:3:1241387:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.0km (0.6 miles) ⓘNosatá skála pegmatite, Moldanubian Zone pegmatites, Vlastějovice, Kutná Hora District, Central Bohemian Region, Czech Republic
22.4km (13.9 miles) ⓘMalešov deposit, Malešov, Kutná Hora District, Central Bohemian Region, Czech Republic
22.6km (14.0 miles) ⓘPřibyslavice, Vlkaneč, Kutná Hora District, Central Bohemian Region, Czech Republic
28.2km (17.5 miles) ⓘMarkovice quarry, Žleby, Kutná Hora District, Central Bohemian Region, Czech Republic
28.6km (17.8 miles) ⓘNové Dvory eclogite outcrop, Nové Dvory, Kutná Hora District, Central Bohemian Region, Czech Republic
29.7km (18.4 miles) ⓘKvasetice, Havlíčkův Brod District, Vysočina Region, Czech Republic
29.9km (18.6 miles) ⓘJilem pegmatite locality, Jilem, Havlíčkův Brod District, Vysočina Region, Czech Republic
38.5km (23.9 miles) ⓘNemojov quarry, Nemojov, Pelhřimov, Pelhřimov District, Vysočina Region, Czech Republic
38.7km (24.0 miles) ⓘVysoká hill, Havlíčkův Brod District, Vysočina Region, Czech Republic
39.1km (24.3 miles) ⓘGranite quarry, Pohled, Havlíčkův Brod District, Vysočina Region, Czech Republic
References
Novák, M., Kadlec, T., Gadas, P. (2013) Geological position, mineral assemblages and contamination of granitic pegmatites in the Moldanubian Zone, Czech Republic; examples from the Vlastějovice region. Journal of GEOsciences, 58 (1) 21-47
 
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