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Biotite from
Standard Mine, Ruby Mining District (Elk Mountain Mining District; Irwin Mining District), Gunnison Co., Colorado, USA

Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
References
References:Caine, J.S., Manning, A.H., Berger, B.R., Kremer, Y., Guzman, M.A., Eberl, D.D., and Schuller, K. (2010): USGS Open-File Report 10-1008
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Standard Mine, Ruby Mining District (Elk Mountain Mining District; Irwin Mining District), Gunnison Co., Colorado, USA
Nearest other occurrences of Biotite
3.7km (2.3 miles) Mt. Emmons/Crested Butte (Chautauqua; Daisey; Daisey Mine; Mt. Emmons; Crested Butte), Elk Mountain Mining District (Snowmass Mountain Mining District), Gunnison Co., Colorado, USA
18.9km (11.8 miles) West Maroon Pass Area, Pitkin Co., Colorado, USA
29.3km (18.2 miles) Italian Mountain, Taylor Park, Dorchester Mining District, Gunnison Co., Colorado, USA
32.9km (20.4 miles) Comet group (Comet prospect), Gunnison Co., Colorado, USA
47.0km (29.2 miles) Gunnison District Occurrence (W.C. Dillon; MS 10715), Gunnison Mining District, Gunnison Co., Colorado, USA
49.3km (30.6 miles) Boulder Creek, Gold Brick Mining District, Gunnison Co., Colorado, USA
49.9km (31.0 miles) Black Wonder Occurrence, Quartz Creek Pegmatite Mining District, Gunnison Co., Colorado, USA
51.0km (31.7 miles) Bucky pegmatite (New Anniversary; Willow Creek), Quartz Creek Pegmatite Mining District, Gunnison Co., Colorado, USA
51.1km (31.8 miles) Gold Basin District Occurrence (MS 1984; Patented Claim: Belle Flora), Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison Co., Colorado, USA
51.5km (32.0 miles) Independence (Independence Pass), Columbia Mining District (Ashcroft Mining District), Pitkin Co., Colorado, USA
 
Mineral and/or Locality  
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