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
Lavin, Zernez, Engiadina Bassa/Val Müstair Region, Grisons, Switzerland


Locality type:Village
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 Lavin, Zernez, Engiadina Bassa/Val Müstair Region, Grisons, Switzerland
Data Identifiers
Mindat Occurrence Record ID:823849
Long-form Identifier:1:3:823849:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
26.4km (16.4 miles) ⓘValschaviel valley, Gaschurn, Bludenz District, Vorarlberg, Austria
41.0km (25.5 miles) ⓘMürasciola, Camp Valley, Poschiavo, Bernina Region, Grisons, Switzerland
47.4km (29.5 miles) ⓘGran Zebrù Glacier (Vedretta del Gran Zebrù), Cedec Valley, Valfurva, Sondrio Province, Lombardy, Italy
47.6km (29.6 miles) ⓘOrtles-Gran Zebrù northeast slope (Ortler-Königspitze northeast slope), Stilfs (Stelvio), Vinschgau (Val Venosta), South Tyrol, Trentino-Alto Adige/Südtirol, Italy
48.3km (30.0 miles) ⓘBottiglia Pass (Königsjoch), Cedec Valley, Valfurva, Sondrio Province, Lombardy, Italy
48.5km (30.2 miles) ⓘVedretta di Solda (Suldenferner), Stilfs (Stelvio), Vinschgau (Val Venosta), South Tyrol, Trentino-Alto Adige/Südtirol, Italy
51.3km (31.9 miles) ⓘLower Scerscen Glacier, Scerscen Valley, Lanzada, Sondrio Province, Lombardy, Italy
52.2km (32.4 miles) ⓘQuadrada (incl. Quadradin), Selva, Poschiavo, Bernina Region, Grisons, Switzerland
52.5km (32.6 miles) ⓘPeder Valley, Martell (Martello), Vinschgau (Val Venosta), South Tyrol, Trentino-Alto Adige/Südtirol, Italy
53.6km (33.3 miles) ⓘSchmorrasgrat-South, Ausserferrera, Ferrera, Viamala Region, Grisons, Switzerland
References
Krähenbühl (1987): Die Eisen-Kupfer-Vorkommen von Lavin, Unterengadin. Bergknappe 42, 23-35.
 
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