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
San Francisco Mining District, Beaver County, Utah, USA


Locality type:Mining District
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 San Francisco Mining District, Beaver County, Utah, USA
Data Identifiers
Mindat Occurrence Record ID:151117
Long-form Identifier:1:3:151117:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
14.3km (8.9 miles) ⓘOK Mine (Milford Pit), Beaver Lake Mining District, Beaver County, Utah, USA
38.0km (23.6 miles) ⓘRoosevelt Hot Springs, Roosevelt Hot Springs Mining District, Beaver County, Utah, USA
41.9km (26.0 miles) ⓘUnknown Mine (MRDS - 10010570), Antelope Springs District, Millard County, Utah, USA
56.4km (35.0 miles) ⓘTwin Peaks Iron Mine, Twin Peaks Mining District, Millard County, Utah, USA
72.1km (44.8 miles) ⓘUnknown Adit Occurrence (MRDS - 10010733), Notch Peak Mining District, Millard County, Utah, USA
74.3km (46.2 miles) ⓘAmasa Valley, House Range, Millard County, Utah, USA
89.8km (55.8 miles) ⓘUnknown Silver - Copper Occurrence (MRDS - 10011191), Antelope Range Mining District, Antelope Range, Iron County, Utah, USA
References
Butler, B.S. (1913) Geology and ore deposits of the San Francisco and adjacent districts, Utah. Professional Paper 80. US Geological Survey doi:10.3133/pp80
Petersen, Erich U., (2001) Porphyry Cu-Style Mineralization Potential In The San Francisco District, Ut. GSA Annual Meeting, November 5-8, 2001
 
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