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
Kopsa, Haapajärvi, North Ostrobothnia, Finland


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 Kopsa, Haapajärvi, North Ostrobothnia, Finland
Data Identifiers
Mindat Occurrence Record ID:847184
Long-form Identifier:1:3:847184:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
38.6km (24.0 miles) ⓘRauhala Deposit, Ylivieska, North Ostrobothnia, Finland
39.2km (24.3 miles) ⓘVesiperä, Haapavesi, North Ostrobothnia, Finland
49.9km (31.0 miles) ⓘKurula, Ylivieska, North Ostrobothnia, Finland
52.8km (32.8 miles) ⓘKoivusaarenneva, Kälviä, Kokkola, Central Ostrobothnia, Finland
57.1km (35.5 miles) ⓘHuhta deposit, Kalajoki, North Ostrobothnia, Finland
58.8km (36.5 miles) ⓘRuostesuo Mine, Kiuruvesi, North Savo, Finland
59.4km (36.9 miles) ⓘJouhineva, Rautio, Kalajoki, North Ostrobothnia, Finland
78.3km (48.6 miles) ⓘHirvikangas, Kalajoki, North Ostrobothnia, Finland
87.1km (54.1 miles) ⓘKatajakangas deposit, Kajaani, Kainuu, Finland
91.2km (56.7 miles) ⓘLaivakangas-N (Näädänmaa; Näädänmalmi), Raahe, North Ostrobothnia, Finland
References
Geological Survey of Finland 2007 Kopsa - Gold Database
Eilu, Pasi (2003) Exploration for orogenic gold deposits. Fennoscandian Exploration and Mining. Rovaniemi.
 
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