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
Block Quarry, Stone Mountain-Lithonia Mining District, DeKalb 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 Block Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
Data Identifiers
Mindat Occurrence Record ID:1533818
Long-form Identifier:1:3:1533818:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.9km (0.6 miles) ⓘWells Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
3.0km (1.9 miles) ⓘCoffey Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
3.4km (2.1 miles) ⓘVenable Estate Quarries, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
3.6km (2.2 miles) ⓘKellogg Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
3.7km (2.3 miles) ⓘEthel quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
4.0km (2.5 miles) ⓘStone Mountain Quarry, DeKalb County, Georgia, USA
4.2km (2.6 miles) ⓘBritt Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
5.0km (3.1 miles) ⓘHayne Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
5.7km (3.5 miles) ⓘLithonia Post Office, DeKalb County, Georgia, USA
8.8km (5.5 miles) ⓘCenterville, Gwinnett County, Georgia, USA
References
91.
Herrmann, Leo Anthony (1954) Geology of the Stone Mountain-Lithonia District, Georgia. Bulletin 61. Geological Survey of Georgia
 
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