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
Undeland 09 Feldspar Prospect, Undeland, Evje og Hornnes, Agder, Norway


Locality type:Prospect
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 Undeland 09 Feldspar Prospect, Undeland, Evje og Hornnes, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:1647474
Long-form Identifier:1:3:1647474:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.1km (0.0 miles) ⓘUndeland 10 Feldspar Quarry, Undeland, Evje og Hornnes, Agder, Norway
0.5km (0.3 miles) ⓘUndeland 02 Feldspar Quarry (Beryl quarry), Undeland, Evje og Hornnes, Agder, Norway
0.6km (0.4 miles) ⓘBjorland 1 Feldspar Quarry, Evje og Hornnes, Agder, Norway
0.8km (0.5 miles) ⓘUndeland, Evje og Hornnes, Agder, Norway
0.8km (0.5 miles) ⓘUndeland 06 Feldspar Quarry, Undeland, Evje og Hornnes, Agder, Norway
0.9km (0.6 miles) ⓘUndeland 01 Feldspar Quarry, Undeland, Evje og Hornnes, Agder, Norway
1.0km (0.6 miles) ⓘUndeland 04 Feldspar Quarry, Undeland, Evje og Hornnes, Agder, Norway
1.6km (1.0 miles) ⓘFolefalla Quarries, Evje og Hornnes, Agder, Norway
1.6km (1.0 miles) ⓘBagli Pegmatite Dike, Evje og Hornnes, Agder, Norway
1.7km (1.0 miles) ⓘBagli Quartz Prospect, Evje og Hornnes, Agder, Norway
References
(n.d.) Evje og Hornnes geomuseum Fennefoss Collection.
 
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