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
Mouat Ni-Cu Verdegris Creek prospect, Stillwater County, Montana, USA


Locality type:Prospect
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 Mouat Ni-Cu Verdegris Creek prospect, Stillwater County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:656694
Long-form Identifier:1:3:656694:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
13.4km (8.3 miles) ⓘIron Mountain, Sweet Grass County, Montana, USA
32.2km (20.0 miles) ⓘCartwright Calcite Deposit (Cartwright Crystal Spar Group), Sweet Grass County, Montana, USA
65.2km (40.5 miles) ⓘCrevasse Mountain Mine (Jardine; Mineral Hill Mine; TVX Mineral Hill 0300670001; Jardine Mine; Jardine Jv), Crevasse Mining District (Crevice Mining District; Jardine Mining District), Park County, Montana, USA
98.7km (61.3 miles) ⓘMica Creek Deposit (Mica Mine), Gallatin Range, Gallatin County, Montana, USA
References
USGS Miscellaneous Field Studies Map 2038
 
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