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
Hebbersfors (Häbbersfors), Sandfors, Skellefteå, Västerbotten County, Sweden


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 Hebbersfors (Häbbersfors), Sandfors, Skellefteå, Västerbotten County, Sweden
Data Identifiers
Mindat Occurrence Record ID:482574
Long-form Identifier:1:3:482574:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘBjörkdal Mine, Sandfors, Skellefteå, Västerbotten County, Sweden
12.9km (8.0 miles) ⓘBoliden Mine, Boliden, Skellefteå, Västerbotten County, Sweden
13.9km (8.6 miles) ⓘÅkerberg mine, Skellefteå, Västerbotten County, Sweden
16.6km (10.3 miles) ⓘVaruträsk, Skellefteå, Västerbotten County, Sweden
17.0km (10.6 miles) ⓘÅkulla Au-Te deposit, Boliden, Skellefteå, Västerbotten County, Sweden
17.4km (10.8 miles) ⓘYtterbodliden, Skellefteå, Västerbotten County, Sweden
24.5km (15.2 miles) ⓘPetiknäs mine, Boliden, Skellefteå, Västerbotten County, Sweden
28.5km (17.7 miles) ⓘBergskär, Skellefteå, Västerbotten County, Sweden
33.9km (21.1 miles) ⓘÄlgliden dyke, Skellefteå, Västerbotten County, Sweden
73.6km (45.8 miles) ⓘKluntarna, Piteå, Norrbotten County, Sweden
References
T. Wikström, thesis from Stockholm University
 
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