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
Chiavennite dike, Blåfjell (E18 roadcuts), Kokkersvold - Blåfjell E18 roadcuts, Langangen, Porsgrunn, Telemark, Norway


Locality type:Road Cutting
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 Chiavennite dike, Blåfjell (E18 roadcuts), Kokkersvold - Blåfjell E18 roadcuts, Langangen, Porsgrunn, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:1604489
Long-form Identifier:1:3:1604489:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘKokkersvold, Kokkersvold - Blåfjell E18 roadcuts, Langangen, Porsgrunn, Telemark, Norway
4.0km (2.5 miles) ⓘRønningen E 18 roadcuts, Porsgrunn, Telemark, Norway
4.9km (3.1 miles) ⓘE18 roadcuts, Slevolden, Porsgrunn, Telemark, Norway
5.8km (3.6 miles) ⓘSagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
5.8km (3.6 miles) ⓘSaga 1 Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway
5.8km (3.6 miles) ⓘBjørkedalsvegen road cut 1, Kjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norway
6.1km (3.8 miles) ⓘVevja 3 Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
6.3km (3.9 miles) ⓘVevja 2 Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
6.6km (4.1 miles) ⓘVevja Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
6.6km (4.1 miles) ⓘVevja East Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
References
Raade, Gunnar, Åmli, Reidar, Mladeck, Micael H., Din, Victor K., Larsen, Alf Olav, Åsheim, Arne (1983) Chiavennite from syenite pegmatites in the Oslo Region, Norway. American Mineralogist, 68 (5-6) 628-633
 
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