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
Old Ancient Mine, Randolph County, Alabama, 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 Old Ancient Mine, Randolph County, Alabama, USA
Data Identifiers
Mindat Occurrence Record ID:958001
Long-form Identifier:1:3:958001:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.3km (0.2 miles) ⓘGreat Southern No. 5 Mine, Randolph County, Alabama, USA
1.8km (1.1 miles) ⓘClouse prospects, Randolph County, Alabama, USA
2.1km (1.3 miles) ⓘEast Indian Prospect, Randolph County, Alabama, USA
2.5km (1.6 miles) ⓘTrommell No. 2 Prospects, Randolph County, Alabama, USA
3.2km (2.0 miles) ⓘArnott Road Prospect, Randolph County, Alabama, USA
8.2km (5.1 miles) ⓘPearce Lenless Nos. 2; 3 & 4 Prospects, Randolph County, Alabama, USA
15.3km (9.5 miles) ⓘJ. J. Smith No. 2 prospect, Clay County, Alabama, USA
17.5km (10.9 miles) ⓘJones-Bunn prospect, Clay County, Alabama, USA
27.0km (16.8 miles) ⓘM&G Mine, Clay County, Alabama, USA
27.8km (17.3 miles) ⓘFour Pits prospect, Clay County, Alabama, USA
References
Heinrich, E.W., Olson, J.C. (1953) Mica deposits of the southeastern Piedmont, Part 11, Alabama district. Professional Paper 248g. US Geological Survey doi:10.3133/pp248g
 
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