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
Døvikkollen, Modum West, Modum, Buskerud, Norway


Locality type:Mine
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 Døvikkollen, Modum West, Modum, Buskerud, Norway
Data Identifiers
Mindat Occurrence Record ID:1340247
Long-form Identifier:1:3:1340247:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.0km (1.9 miles) ⓘHilsen Farm, Snarum, Modum, Buskerud, Norway
4.9km (3.0 miles) ⓘDypingdal serpentine-magnesite deposit, Snarum, Modum, Buskerud, Norway
5.8km (3.6 miles) ⓘSkuterud Mines, Modum West, Modum, Buskerud, Norway
6.6km (4.1 miles) ⓘMellomgruvene, Skuterud Mines, Modum West, Modum, Buskerud, Norway
12.1km (7.5 miles) ⓘGrågalten Mine, Sigdal Nikkelværk, Sigdal, Buskerud, Norway
13.2km (8.2 miles) ⓘErtelien Mine, Ertelien Mines, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
15.1km (9.4 miles) ⓘSkjerpevika, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
18.3km (11.4 miles) ⓘSkaug Mine, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
18.4km (11.4 miles) ⓘBjertnes pegmatite, Krødsherad, Buskerud, Norway
24.1km (15.0 miles) ⓘGrøsli Mine, Flesberg, Buskerud, Norway
References
Geological Survey of Norway (NGU). The Ore Database (Malmdatabasen). Deposit Area 623 - 026. Døvikkollen
 
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