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
Toncrae Mine (Toncrae-Howard Mine; Toncray Mine), Southern Lead, Southern Section-Blue Ridge Province, Floyd County, Virginia, 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 Toncrae Mine (Toncrae-Howard Mine; Toncray Mine), Southern Lead, Southern Section-Blue Ridge Province, Floyd County, Virginia, USA
Data Identifiers
Mindat Occurrence Record ID:343871
Long-form Identifier:1:3:343871:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.5km (1.6 miles) ⓘWeddle Prospect, Southern Section-Blue Ridge Province, Floyd County, Virginia, USA
3.1km (1.9 miles) ⓘRocky Knob Prospect, Southern Section-Blue Ridge Province, Floyd County, Virginia, USA
3.1km (2.0 miles) ⓘSutherland Prospect (Nowlin Mine; Fisher; Hylton), Southern Lead, Southern Section-Blue Ridge Province, Floyd County, Virginia, USA
3.9km (2.4 miles) ⓘBelcher Prospect (Weddle Prospect; Old Copper Mine), Southern Lead, Southern Section-Blue Ridge Province, Floyd County, Virginia, USA
5.3km (3.3 miles) ⓘHilton Prospect (Hylton Prospect), Southern Lead, Southern Section-Blue Ridge Province, Floyd County, Virginia, USA
31.1km (19.3 miles) ⓘBetty Baker Mine (Bettie Baker Mine; Paint Bank Mine; Carter Mine), Betty Baker Segment, Gossan Lead Mining District, Southern Section-Blue Ridge Province, Carroll County, Virginia, USA
35.8km (22.2 miles) ⓘBrown and Stephenson Mine (Brown and Stevenson Mine), Cranberry Creek Segment, Gossan Lead Mining District, Southern Section-Blue Ridge Province, Carroll County, Virginia, USA
35.9km (22.3 miles) ⓘFairmont Copper Mine (Fairmount Copper Mine), Cranberry Creek Segment, Gossan Lead Mining District, Southern Section-Blue Ridge Province, Carroll County, Virginia, USA
36.5km (22.7 miles) ⓘCranberry Copper Mine, Cranberry Creek Segment, Gossan Lead Mining District, Southern Section-Blue Ridge Province, Carroll County, Virginia, USA
40.2km (25.0 miles) ⓘMount Airy quarries, Surry County, North Carolina, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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