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
Mustavaara, Taivalkoski, 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 Mustavaara, Taivalkoski, North Ostrobothnia, Finland
Data Identifiers
Mindat Occurrence Record ID:849800
Long-form Identifier:1:3:849800:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
21.3km (13.3 miles) ⓘKortejärvi Carbonatite, Pudasjärvi, North Ostrobothnia, Finland
22.7km (14.1 miles) ⓘLaivajoki Carbonatite, Posio, Lapland, Finland
48.5km (30.1 miles) ⓘKouvervaara, Kuusamo, North Ostrobothnia, Finland
52.7km (32.7 miles) ⓘSäynäjävaara, Kuusamo, North Ostrobothnia, Finland
59.5km (36.9 miles) ⓘHonkilehto, Kuusamo, North Ostrobothnia, Finland
60.1km (37.3 miles) ⓘKonttiaho, Kuusamo, North Ostrobothnia, Finland
60.2km (37.4 miles) ⓘSivakkaharju, Kuusamo, North Ostrobothnia, Finland
62.0km (38.5 miles) ⓘMeurastuksenaho, Kuusamo, North Ostrobothnia, Finland
66.0km (41.0 miles) ⓘNäränkävaara, Kuusamo, North Ostrobothnia, Finland
69.3km (43.0 miles) ⓘSääskilampi, Ranua, Lapland, Finland
References
Jupperi Aarre 1997. The magnetite gabbro and related Mustavaara vanadium ore deposits in the Porttivaara layered intrusion north-eastern Finland. Geological Survey of Finland Bulletin 288
 
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