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
Koivusaarenneva, Kälviä, Kokkola, Central 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 Koivusaarenneva, Kälviä, Kokkola, Central Ostrobothnia, Finland
Data Identifiers
Mindat Occurrence Record ID:889807
Long-form Identifier:1:3:889807:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
50.7km (31.5 miles) ⓘLappajärvi meteorite crater, Lappajärvi, South Ostrobothnia, Finland
51.0km (31.7 miles) ⓘHuhta deposit, Kalajoki, North Ostrobothnia, Finland
52.8km (32.8 miles) ⓘKopsa, Haapajärvi, North Ostrobothnia, Finland
53.3km (33.1 miles) ⓘJouhineva, Rautio, Kalajoki, North Ostrobothnia, Finland
57.3km (35.6 miles) ⓘHirvikangas, Kalajoki, North Ostrobothnia, Finland
58.6km (36.4 miles) ⓘKurula, Ylivieska, North Ostrobothnia, Finland
59.1km (36.7 miles) ⓘRauhala Deposit, Ylivieska, North Ostrobothnia, Finland
67.8km (42.1 miles) ⓘVesiperä, Haapavesi, North Ostrobothnia, Finland
References
Chernet, T. (1999) Applied mineralogical studies of Koivusaarenneva ilmenite deposit, Kälvia, Western Finland, with special emphasis on the altered part of the ore. (Chronicle of Mineral Research and Exploration, in press).
 
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