Vote for your favorite mineral in #MinCup26! - Monazite-(Ce) vs. Andalusite
It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
West Maroon Pass Area, Pitkin County, Colorado, USA


Locality type:Area
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 West Maroon Pass Area, Pitkin County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:811817
Long-form Identifier:1:3:811817:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
18.7km (11.6 miles) ⓘMt. Emmons/Crested Butte (Chautauqua; Daisey; Daisey Mine; Mt. Emmons; Crested Butte), Elk Mountain Mining District (Snowmass Mountain Mining District), Gunnison County, Colorado, USA
18.9km (11.8 miles) ⓘStandard Mine, Ruby Mining District (Elk Mountain Mining District; Irwin Mining District), Gunnison County, Colorado, USA
23.0km (14.3 miles) ⓘItalian Mountain, Taylor Park, Dorchester Mining District, Gunnison County, Colorado, USA
23.3km (14.5 miles) ⓘComet group (Comet prospect), Gunnison County, Colorado, USA
33.6km (20.9 miles) ⓘPanco Manganese Deposit, Snowmass Area, Pitkin County, Colorado, USA
38.0km (23.6 miles) ⓘIndependence (Independence Pass), Columbia Mining District (Ashcroft Mining District), Pitkin County, Colorado, USA
55.5km (34.5 miles) ⓘBoulder Creek, Gold Brick Mining District, Gunnison County, Colorado, USA
57.9km (36.0 miles) ⓘDutch Flat Gulch, Gold Brick Mining District, Gunnison County, Colorado, USA
58.6km (36.4 miles) ⓘTurquoise Lake Occurrence, St. Kevin - Independence, Lake County, Colorado, USA
59.0km (36.7 miles) ⓘBon Ton Mine, Monarch Mining District, Chaffee County, Colorado, USA
References
Truebe, Henry A. (1977) Orthoclase from West Maroon Pass, Colorado. The Mineralogical Record, 8 (5) 363-367
 
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