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
Mørefjær Feldspar Quarry (Mörefjer), 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 Mørefjær Feldspar Quarry (Mörefjer), Stokken, Arendal, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:682867
Long-form Identifier:1:3:682867:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.2km (0.1 miles) ⓘAlviken Feldspar Quarry, Stokken, Arendal, Agder, Norway
0.9km (0.5 miles) ⓘHella 1 Feldspar Quarry, Helle, Stokken, Arendal, Agder, Norway
0.9km (0.6 miles) ⓘHella 2 Feldspar Quarry, Helle, Stokken, Arendal, Agder, Norway
2.5km (1.6 miles) ⓘHamnevollneset, Stokken, Arendal, Agder, Norway
3.0km (1.8 miles) ⓘGarta Feldspar Quarry, Stokken, Arendal, Agder, Norway
5.9km (3.7 miles) ⓘNarestø Feldspar Quarry, Flosta, Arendal, Agder, Norway
8.7km (5.4 miles) ⓘGloserheia, Froland, Agder, Norway
8.7km (5.4 miles) ⓘÅrgruven Iron Mine, Lyngrott Mining Field, Lyngrott, Froland, Agder, Norway
9.0km (5.6 miles) ⓘKlodeborg Mines, Øyestad, Arendal, Agder, Norway
9.2km (5.7 miles) ⓘSeljeåsen Quartz Prospect, Seljåsen, Lyngrott, Froland, Agder, Norway
References
Andersen, Olaf (1931) Feltspat II. Forekomster i fylkene Buskerud og Telemark, i flere herreder i Aust-Agder og i Hidra i Vest-Agder [Feldspar II. Occurrences in the counties of Buskerud and Telemark, in several counties in Aust-Agder and in Hidra in Vest-Agder], in Feltspat II. Feltspat III. Norges Geologiske Undersøkelse 128b, 1-109 pp.72-73
 
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