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
Crevasse Mountain Mine (Jardine; Mineral Hill Mine; TVX Mineral Hill 0300670001; Jardine Mine; Jardine Jv), Crevasse Mining District (Crevice Mining District; Jardine Mining District), Park County, Montana, 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 Crevasse Mountain Mine (Jardine; Mineral Hill Mine; TVX Mineral Hill 0300670001; Jardine Mine; Jardine Jv), Crevasse Mining District (Crevice Mining District; Jardine Mining District), Park County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:600930
Long-form Identifier:1:3:600930:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
56.7km (35.2 miles) ⓘIron Mountain, Sweet Grass County, Montana, USA
62.9km (39.1 miles) ⓘMica Creek Deposit (Mica Mine), Gallatin Range, Gallatin County, Montana, USA
65.2km (40.5 miles) ⓘMouat Ni-Cu Verdegris Creek prospect, Stillwater County, Montana, USA
69.4km (43.1 miles) ⓘAlbitite, West Gallatin Mining District, Gallatin County, Montana, USA
81.8km (50.8 miles) ⓘElk Creek corundum deposit (Montana Mine; Gallatin deposit; Flying D), Gallatin County, Montana, USA
82.4km (51.2 miles) ⓘGallatin Corundum deposit, Gallatin Gateway, Gallatin County, Montana, USA
83.5km (51.9 miles) ⓘBozeman Corundum Mine, Gallatin Gateway, Gallatin County, Montana, USA
87.1km (54.1 miles) ⓘCartwright Calcite Deposit (Cartwright Crystal Spar Group), Sweet Grass County, Montana, USA
90.8km (56.4 miles) ⓘBeartrap corundum deposit, Madison County, Montana, USA
References
Mueller, Andreas G. (1997) The Nevoria gold skarn deposit in Archean iron-formation, Southern Cross greenstone belt, Western Australia: I. Tectonic setting, petrography, and classification. Economic Geology, 92 (2). 181-209 doi:10.2113/gsecongeo.92.2.181
 
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