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Biotite from
Beryl No. 1 claim, Gold Hill Mining District, Boulder County, Colorado, USA


Locality type:Claim
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 Beryl No. 1 claim, Gold Hill Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:743324
Long-form Identifier:1:3:743324:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.8km (1.1 miles) ⓘWilson beryl prospect, Gold Hill Mining District, Boulder County, Colorado, USA
6.5km (4.1 miles) ⓘRusty Gold Mine (Copper Blush occurrence), Jamestown Mining District, Boulder County, Colorado, USA
24.7km (15.3 miles) ⓘWheeler Basin, Grand County, Colorado, USA
24.8km (15.4 miles) ⓘBennett Mine (Hell Hole claims), Wheeler Basin, Grand County, Colorado, USA
26.4km (16.4 miles) ⓘStrang pegmatite occurrence (S. B. Strang Ralston Creek pegmatite), Clear Creek Pegmatite Province, Jefferson County, Colorado, USA
27.4km (17.0 miles) ⓘSchwartzwalder Mine (Ralston Creek Mine), Ralston Buttes Mining District, Jefferson County, Colorado, USA
28.0km (17.4 miles) ⓘNye-Mathews mine (Wilma mine), Apex Mining District (Kingston Mining District; Pine Mining District), Gilpin County, Colorado, USA
33.5km (20.8 miles) ⓘCressmans Gulch Mine (Cressmans Gulch pegmatite), Clear Creek pegmatite Province, Jefferson County, Colorado, USA
33.7km (20.9 miles) ⓘEast Inlet area, Grand County, Colorado, USA
33.8km (21.0 miles) ⓘBurlington - Iowa Group, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
References
Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227
 
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