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
Jack Bell Prospect, Rockdale County, Georgia, USA


Locality type:Prospect
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 Jack Bell Prospect, Rockdale County, Georgia, USA
Data Identifiers
Mindat Occurrence Record ID:955821
Long-form Identifier:1:3:955821:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
17.2km (10.7 miles) ⓘLithonia Post Office, DeKalb County, Georgia, USA
19.5km (12.1 miles) ⓘCoffey Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
22.3km (13.9 miles) ⓘWells Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
22.5km (14.0 miles) ⓘBlock Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
24.8km (15.4 miles) ⓘCenterville, Gwinnett County, Georgia, USA
25.6km (15.9 miles) ⓘEthel quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
25.9km (16.1 miles) ⓘVenable Estate Quarries, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
26.1km (16.2 miles) ⓘKellogg Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
26.3km (16.3 miles) ⓘBritt Quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USA
26.4km (16.4 miles) ⓘStone Mountain Quarry, DeKalb County, Georgia, USA
References
Heinrich, E.W., Klepper, M.R., Jahns, R.H. (1953) Mica deposits of the southeastern Piedmont, Part 9, Thomaston-Barnesville district, Georgia; Part 10, Outlying deposits in Georgia. Professional Paper 248f. US Geological Survey doi:10.3133/pp248f
 
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