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
Trommell No. 2 Prospects, Randolph County, Alabama, 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 Trommell No. 2 Prospects, Randolph County, Alabama, USA
Data Identifiers
Mindat Occurrence Record ID:957884
Long-form Identifier:1:3:957884:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.7km (0.5 miles) ⓘClouse prospects, Randolph County, Alabama, USA
0.9km (0.6 miles) ⓘArnott Road Prospect, Randolph County, Alabama, USA
0.9km (0.6 miles) ⓘEast Indian Prospect, Randolph County, Alabama, USA
2.3km (1.4 miles) ⓘGreat Southern No. 5 Mine, Randolph County, Alabama, USA
2.5km (1.6 miles) ⓘOld Ancient Mine, Randolph County, Alabama, USA
7.6km (4.7 miles) ⓘPearce Lenless Nos. 2; 3 & 4 Prospects, Randolph County, Alabama, USA
13.0km (8.1 miles) ⓘJ. J. Smith No. 2 prospect, Clay County, Alabama, USA
15.5km (9.6 miles) ⓘJones-Bunn prospect, Clay County, Alabama, USA
25.5km (15.8 miles) ⓘM&G Mine, Clay County, Alabama, USA
26.3km (16.4 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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