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
Frikstad 10 Feldspar Quarry (Stemyr), Frikstad, 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 Frikstad 10 Feldspar Quarry (Stemyr), Frikstad, Iveland, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:539671
Long-form Identifier:1:3:539671:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.3km (0.2 miles) ⓘFrikstad 09 Feldspar Quarry (Steli), Frikstad, Iveland, Agder, Norway
0.7km (0.4 miles) ⓘKåbuland 03 Feldspar Quarry, Kåbuland, Iveland, Agder, Norway
0.7km (0.4 miles) ⓘFrikstad 33 Feldspar Quarry, Frikstad, Iveland, Agder, Norway
0.7km (0.4 miles) ⓘFrikstad 32 Feldspar Quarry, Frikstad, Iveland, Agder, Norway
0.7km (0.4 miles) ⓘFrikstad 11 Feldspar Quarry (Småliane), Frikstad, Iveland, Agder, Norway
0.8km (0.5 miles) ⓘFrikstad 12 Feldspar Quarry (Høyland), Frikstad, Iveland, Agder, Norway
1.0km (0.6 miles) ⓘBirkeland 05 Feldspar Quarries, Birkeland, Iveland, Agder, Norway
1.0km (0.6 miles) ⓘFrikstad 14 Feldspar Quarry, Frikstad, Iveland, Agder, Norway
1.1km (0.7 miles) ⓘBirkeland 03 Feldspar Quarry, Birkeland, Iveland, Agder, Norway
1.1km (0.7 miles) ⓘKåbuland 06 Feldspar Quarry (Tunnelen), Kåbuland, 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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