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Biotite from
Cressmans Gulch Mine (Cressmans Gulch pegmatite), Clear Creek pegmatite Province, Jefferson County, Colorado, USA


Locality type:Mine
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 Cressmans Gulch Mine (Cressmans Gulch pegmatite), Clear Creek pegmatite Province, Jefferson County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:355432
Long-form Identifier:1:3:355432:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.7km (0.4 miles) ⓘAubrey - Ladwig Mine (Aubrey Ladwig Lease; Gary Mine), Ralston Buttes Mining District, Jefferson County, Colorado, USA
3.0km (1.9 miles) ⓘLadwig, Ralston Buttes Mining District, Jefferson County, Colorado, USA
3.5km (2.2 miles) ⓘFred Pierce Ranch (Ramstetter Quarry), Front Range, Jefferson County, Colorado, USA
6.2km (3.8 miles) ⓘSchwartzwalder Mine (Ralston Creek Mine), Ralston Buttes Mining District, Jefferson County, Colorado, USA
9.3km (5.8 miles) ⓘHosa Lodge Mine, Evergreen Mining District (Malachite Mining District), Jefferson County, Colorado, USA
9.7km (6.0 miles) ⓘRoscoe Beryl Mine (Roscoe pegmatite), Clear Creek pegmatite Province, Jefferson County, Colorado, USA
10.7km (6.7 miles) ⓘStrang pegmatite occurrence (S. B. Strang Ralston Creek pegmatite), Clear Creek Pegmatite Province, Jefferson County, Colorado, USA
12.4km (7.7 miles) ⓘF.M.D. Mine, Evergreen Mining District (Malachite Mining District), Jefferson County, Colorado, USA
12.5km (7.7 miles) ⓘHiwan Ranch, Clear Creek Pegmatite Province, Jefferson County, Colorado, USA
13.0km (8.1 miles) ⓘBurroughs Mine (Traut-Rudin-Anderson Pegmatite; Sunrise Peak Mine), Clear Creek pegmatite Province, Jefferson 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
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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