Vote for your favorite mineral in #MinCup26! - Cuprite vs. Halite
While externally similar shapes, these two minerals are very different inside.
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Biotite from
Bruner Mine, Phonolite, Bruner Mining District, Nye County, Nevada, 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 Bruner Mine, Phonolite, Bruner Mining District, Nye County, Nevada, USA
Data Identifiers
Mindat Occurrence Record ID:1522040
Long-form Identifier:1:3:1522040:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
13.3km (8.2 miles) ⓘJewel Mine (Eagle group?), Ellsworth Mining District (Mammoth Mining District), Nye County, Nevada, USA
27.6km (17.1 miles) ⓘBuffalo Canyon prospect, Berlin, Union Mining District, Nye County, Nevada, USA
32.8km (20.4 miles) ⓘFury pit, Grantsville, Union Mining District, Nye County, Nevada, USA
34.3km (21.3 miles) ⓘGrantsville Summit Prospect, Union Mining District, Nye County, Nevada, USA
79.6km (49.4 miles) ⓘMcMillan Bentonite prospect, Pilot Mountains District, Pilot Mountains, Mineral County, Nevada, USA
80.4km (50.0 miles) ⓘGreen Talc Mine (Donnelly Andalusite Mine), Fitting Mining District, Mineral County, Nevada, USA
References
Baldwin, D. (2014). Evidence for rapid epithermal mineralization and coeval bimodal volcanism, Bruner Au-Ag property, NV USA. University of Nevada, Reno.
 
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