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
Marsfjället gneiss unit, Seve Nappe Complex, Vilhelmina, Västerbotten County, Sweden


Locality type:Rock Unit
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 Marsfjället gneiss unit, Seve Nappe Complex, Vilhelmina, Västerbotten County, Sweden
Data Identifiers
Mindat Occurrence Record ID:1358835
Long-form Identifier:1:3:1358835:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
58.8km (36.5 miles) ⓘGieravardo, Storuman, Västerbotten County, Sweden
84.1km (52.2 miles) ⓘTjeliken eclogite, Strömsund, Jämtland County, Sweden
97.8km (60.8 miles) ⓘKongsfjellet 1, Kongsfjell, Hemnes, Nordland, Norway
References
 
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