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
Red Oak Quarry, Red Oak, Fulton County, Georgia, USA


Locality type:Quarry
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 Red Oak Quarry, Red Oak, Fulton County, Georgia, USA
Data Identifiers
Mindat Occurrence Record ID:1668433
Long-form Identifier:1:3:1668433:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
25.2km (15.6 miles) ⓘMcCollum Quarry, Newman, Coweta County, Georgia, USA
25.3km (15.7 miles) ⓘI-85 roadcut, Fulton County, Georgia, USA
35.1km (21.8 miles) ⓘMarietta Mine, Marietta, Cobb County, Georgia, USA
35.6km (22.1 miles) ⓘLithonia Post Office, DeKalb County, Georgia, USA
37.1km (23.1 miles) ⓘWells Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
38.0km (23.6 miles) ⓘCoffey Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
38.0km (23.6 miles) ⓘBlock Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
38.3km (23.8 miles) ⓘHayne Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
38.5km (23.9 miles) ⓘVenable Estate Quarries, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
39.2km (24.3 miles) ⓘKellogg Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
References
Confirmed by XRD by Travis Olds. This biotite trending towards pholgopite.Identified by Julian Gray: XRD
 
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