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Biotite from
Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA

Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
References
References:U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Portis Mine (C. M. Wright Mine), Franklin Co., North Carolina, USA
Nearest other occurrences of Biotite
15.6km (9.7 miles) Castalia Quarry, Franklin Co., North Carolina, USA
34.9km (21.7 miles) Greystone Quarry, Vance Co., North Carolina, USA
49.0km (30.4 miles) Neverson Quarry, Wilson Co., North Carolina, USA
49.0km (30.5 miles) Townsville, Townsville Township, Vance Co., North Carolina, USA
53.6km (33.3 miles) Tungsten Queen Mine and plant (Hamme Mine; Haile Mines; Sneed-Walker), Tungsten, Hamme Tungsten Mining District, Vance Co., North Carolina, USA
73.7km (45.8 miles) Nello Teer Crabtree Creek Quarry (Superior Stone Quarry; Crabtree Quarry; Nello Teer Quarry), Raleigh, Wake Co., North Carolina, USA
78.0km (48.5 miles) Durgy Mine (Yancey Mine; Person Consolidated Mine), Person Co., North Carolina, USA
90.1km (56.0 miles) Hagers Mountain Kyanite deposits, Hagers Mountain, Person Co., North Carolina, USA
 
Mineral and/or Locality  
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