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
Horse Ridge Mine, Yancey County, North Carolina, 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 Horse Ridge Mine, Yancey County, North Carolina, USA
Data Identifiers
Mindat Occurrence Record ID:868198
Long-form Identifier:1:3:868198:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘCarroll Deyton Mine, Yancey County, North Carolina, USA
2.9km (1.8 miles) ⓘJim Curl Mine, Yancey County, North Carolina, USA
3.1km (1.9 miles) ⓘWilliam Hughes Mine, Yancey County, North Carolina, USA
5.0km (3.1 miles) ⓘM. P. Letterman Mine, Yancey County, North Carolina, USA
5.8km (3.6 miles) ⓘChestnut Branch Mine, Double Island, Yancey County, North Carolina, USA
6.4km (4.0 miles) ⓘThomas Mine (Black Bull Mine), Mitchell County, North Carolina, USA
6.4km (4.0 miles) ⓘBanner Mine, Mitchell County, North Carolina, USA
6.7km (4.2 miles) ⓘWaterhole Mine (George Howell Mine), Mitchell County, North Carolina, USA
6.8km (4.2 miles) ⓘLaws Mine, Yancey County, North Carolina, USA
6.8km (4.2 miles) ⓘJeff Howell Mine, Mitchell County, North Carolina, USA
References
Lesure, Frank Gardner (1968) Mica deposits of the Blue Ridge in North Carolina. Professional Paper 577. US Geological Survey doi:10.3133/pp577
 
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