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
Norra Sandsjön quarry, Norra Sandsjö, Nässjö, Jönköping County, Sweden


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 Norra Sandsjön quarry, Norra Sandsjö, Nässjö, Jönköping County, Sweden
Data Identifiers
Mindat Occurrence Record ID:275379
Long-form Identifier:1:3:275379:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.6km (0.4 miles) ⓘWallins quarry, Norra Sandsjö, Nässjö, Jönköping County, Sweden
3.3km (2.1 miles) ⓘKull, Norra Sandsjö, Nässjö, Jönköping County, Sweden
13.8km (8.6 miles) ⓘNömme quartz quarry, Höreda, Eksjö, Jönköping County, Sweden
18.8km (11.7 miles) ⓘSjöholmen quarry, Bäckseda, Vetlanda, Jönköping County, Sweden
18.9km (11.8 miles) ⓘÅrset silver mine, Fröderyd, Vetlanda, Jönköping County, Sweden
19.0km (11.8 miles) ⓘAndersberg mine, Fredriksberg ore field, Fröderyd, Vetlanda, Jönköping County, Sweden
19.0km (11.8 miles) ⓘNorthwest Fredriksberg mine, Fröderyd, Vetlanda, Jönköping County, Sweden
19.1km (11.9 miles) ⓘNya Ludvigsberg mine, Fröderyd, Vetlanda, Jönköping County, Sweden
19.2km (12.0 miles) ⓘChristina mine, Fröderyd, Vetlanda, Jönköping County, Sweden
19.4km (12.1 miles) ⓘKarl XV mine, Fröderyd, Vetlanda, Jönköping County, Sweden
References
Shaikh-Persson-Sundberg-Wik: SGU Rep. 50 , 1989
 
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