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
Alviken Feldspar Quarry, Stokken, Arendal, 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 Alviken Feldspar Quarry, Stokken, Arendal, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:682876
Long-form Identifier:1:3:682876:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.2km (0.1 miles) ⓘMørefjær Feldspar Quarry (Mörefjer), Stokken, Arendal, Agder, Norway
1.0km (0.6 miles) ⓘHella 1 Feldspar Quarry, Helle, Stokken, Arendal, Agder, Norway
1.0km (0.7 miles) ⓘHella 2 Feldspar Quarry, Helle, Stokken, Arendal, Agder, Norway
2.7km (1.7 miles) ⓘHamnevollneset, Stokken, Arendal, Agder, Norway
3.2km (2.0 miles) ⓘGarta Feldspar Quarry, Stokken, Arendal, Agder, Norway
6.1km (3.8 miles) ⓘNarestø Feldspar Quarry, Flosta, Arendal, Agder, Norway
8.6km (5.3 miles) ⓘGloserheia, Froland, Agder, Norway
8.6km (5.4 miles) ⓘÅrgruven Iron Mine, Lyngrott Mining Field, Lyngrott, Froland, Agder, Norway
8.8km (5.5 miles) ⓘKlodeborg Mines, Øyestad, Arendal, Agder, Norway
9.0km (5.6 miles) ⓘUHT granulite outcrop, Havsøysund, Hisøy, Arendal, Agder, Norway
References
Brōgger, W. C. (1881) Nogle bemærkninger om pegmatitgangene ved Moss og deres mineraler. Geologiska Föreningen i Stockholm Förhandlingar, 5 (8) 326-376 doi:10.1080/11035898109443942
 
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