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
Castlen Mine (Colbert Mine), Yatesville, Upson County, Georgia, 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 Castlen Mine (Colbert Mine), Yatesville, Upson County, Georgia, USA
Data Identifiers
Mindat Occurrence Record ID:955042
Long-form Identifier:1:3:955042:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.1km (1.9 miles) ⓘStevens Mine (Rock Mica Mine), Yatesville, Upson County, Georgia, USA
3.3km (2.1 miles) ⓘWalker Prospect, Upson County, Georgia, USA
4.4km (2.7 miles) ⓘAdams Mine, Yatesville, Upson County, Georgia, USA
5.1km (3.1 miles) ⓘReynolds Mine, Upson County, Georgia, USA
5.2km (3.2 miles) ⓘHerron Mine, Upson County, Georgia, USA
6.2km (3.8 miles) ⓘKelly O'Neil Prospects, Upson County, Georgia, USA
6.2km (3.9 miles) ⓘJohnson Mine, Upson County, Georgia, USA
6.5km (4.0 miles) ⓘClay Creek Mine (Harrison W. Harp Mine), Barnesville, Lamar County, Georgia, USA
7.1km (4.4 miles) ⓘWilliams & Holmes Prospects, Lamar County, Georgia, USA
7.3km (4.6 miles) ⓘPerdue Prospect, Lamar 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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