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
Lundestad, Berg, Halden, Østfold, 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 Lundestad, Berg, Halden, Østfold, Norway
Data Identifiers
Mindat Occurrence Record ID:1440963
Long-form Identifier:1:3:1440963:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.1km (1.3 miles) ⓘFosby Feldspar Quarry, Berg, Halden, Østfold, Norway
3.7km (2.3 miles) ⓘVestgård, Berg, Halden, Østfold, Norway
6.2km (3.9 miles) ⓘThe monolith quarry, Idd, Halden, Østfold, Norway
10.3km (6.4 miles) ⓘHerrebøkasa, Aspedammen, Idd, Halden, Østfold, Norway
13.3km (8.3 miles) ⓘBakke Quarry, Idd, Halden, Østfold, Norway
15.8km (9.8 miles) ⓘHåkenbyfjellet, Halden, Østfold, Norway
18.7km (11.6 miles) ⓘVestgård Feldspar Quarry, Skjeberg, Sarpsborg, Østfold, Norway
19.3km (12.0 miles) ⓘStryker I Feldspar Quarry, Degernes, Rakkestad, Østfold, Norway
21.2km (13.2 miles) ⓘOrud quarry, Rakkestad, Østfold, Norway
24.5km (15.2 miles) ⓘRolfseide 2, Rakkestad, Østfold, Norway
References
Sørlie, Thor (1978) Gruve- og skjerpviksomhet i Halden kommune, 1.ærespris Halden Sparebanks Særoppgavekonkurranse 1978. 1-28
 
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