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
Tveit 05 Feldspar Quarry (Gumpen), Tveit, Iveland, Agder, Norway


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 Tveit 05 Feldspar Quarry (Gumpen), Tveit, Iveland, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:540561
Long-form Identifier:1:3:540561:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.2km (0.1 miles) ⓘTveit 06 Feldspar Quarry (Hallvard Tveit's Quarry), Tveit, Iveland, Agder, Norway
1.0km (0.6 miles) ⓘTveit 04 Feldspar Quarry, Tveit, Iveland, Agder, Norway
1.3km (0.8 miles) ⓘFrøysååsen 5 Feldspar Quarry, Frøysååsen, Frøyså, Iveland, Agder, Norway
1.3km (0.8 miles) ⓘFrøyså 05 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
1.6km (1.0 miles) ⓘTveit 02 Feldspar Quarry (Varmekrekken), Tveit, Iveland, Agder, Norway
1.6km (1.0 miles) ⓘSteli Feldspar Quarry (Tveit 03), Tveit, Iveland, Agder, Norway
1.7km (1.0 miles) ⓘFrøyså 03 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
1.7km (1.0 miles) ⓘFrøyså 14 Feldspar Prospect, Frøyså, Iveland, Agder, Norway
1.7km (1.1 miles) ⓘFrøyså 04 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
1.7km (1.1 miles) ⓘFrøyså 06 Feldspar Quarry, Frøyså, Iveland, Agder, Norway
References
Bjørlykke, Knut (1935) The mineral paragenesis and classification of the granite pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 14 (3-4). 211-311
 
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