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
Fjeld Quarry (Fjellvand Quarry), Austre Moland, 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 Fjeld Quarry (Fjellvand Quarry), Austre Moland, Arendal, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:979928
Long-form Identifier:1:3:979928:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.9km (0.6 miles) ⓘGrasås Feldspar Quarry, Austre Moland, Arendal, Agder, Norway
4.0km (2.5 miles) ⓘJensen's Feldspar Quarry, Holt, Tvedestrand, Agder, Norway
4.5km (2.8 miles) ⓘGangdalstjern mine, Solberg iron mines, Holt, Tvedestrand, Agder, Norway
4.9km (3.0 miles) ⓘVåland Mine, Holt, Tvedestrand, Agder, Norway
5.6km (3.5 miles) ⓘNordre Fiane Iron Mine, Solberg iron mines, Holt, Tvedestrand, Agder, Norway
6.3km (3.9 miles) ⓘSeljeåsen Quartz Prospect, Seljåsen, Lyngrott, Froland, Agder, Norway
7.0km (4.3 miles) ⓘÅrgruven Iron Mine, Lyngrott Mining Field, Lyngrott, Froland, Agder, Norway
7.4km (4.6 miles) ⓘGloserheia, Froland, Agder, Norway
8.9km (5.5 miles) ⓘGarta Feldspar Quarry, Stokken, Arendal, Agder, Norway
9.1km (5.7 miles) ⓘHamnevollneset, Stokken, Arendal, Agder, Norway
References
Friis, J. P. (1891) Feldspat, kvarts og glimmer, deres forekomst og anvendelse i industrien, in Norges geologiske undersøgelses aarbog for 1891. Norges Geologiske Undersøkelse (NGU) 1, 50-69
 
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