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
Ear Mountain, York Mountains, Port Clarence Mining District, Nome Census Area, Alaska, USA


Locality type:Mountain
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 Ear Mountain, York Mountains, Port Clarence Mining District, Nome Census Area, Alaska, USA
Data Identifiers
Mindat Occurrence Record ID:567893
Long-form Identifier:1:3:567893:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
51.2km (31.8 miles) ⓘKougarok prospect (Kougarok Sn deposit), Serpentine Mining District, Nome Census Area, Alaska, USA
60.0km (37.3 miles) ⓘBrooks Mountain, York Mountains, Port Clarence Mining District, Nome Census Area, Alaska, USA
66.2km (41.1 miles) ⓘLost River skarn deposit, Lost River Mine, Lost River Valley, Port Clarence Mining District, Nome Census Area, Alaska, USA
References
Econ Geol (1988) 83:46-61
 
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