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
Skaug Mine, Holleia, Ringerike Ni Mines, Ringerike, 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 Skaug Mine, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
Data Identifiers
Mindat Occurrence Record ID:1343352
Long-form Identifier:1:3:1343352:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
5.7km (3.5 miles) ⓘSkjerpevika, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
9.9km (6.1 miles) ⓘErtelien Mine, Ertelien Mines, Holleia, Ringerike Ni Mines, Ringerike, Buskerud, Norway
13.4km (8.4 miles) ⓘDypingdal serpentine-magnesite deposit, Snarum, Modum, Buskerud, Norway
17.8km (11.1 miles) ⓘHilsen Farm, Snarum, Modum, Buskerud, Norway
18.3km (11.4 miles) ⓘDøvikkollen, Modum West, Modum, Buskerud, Norway
20.8km (12.9 miles) ⓘBjertnes pegmatite, Krødsherad, Buskerud, Norway
21.0km (13.1 miles) ⓘLangedalen Mine, Ringerike Ni Mines, Ringerike, Buskerud, Norway
22.1km (13.7 miles) ⓘSkuterud Mines, Modum West, Modum, Buskerud, Norway
22.5km (14.0 miles) ⓘMellomgruvene, Skuterud Mines, Modum West, Modum, Buskerud, Norway
28.1km (17.5 miles) ⓘGrågalten Mine, Sigdal Nikkelværk, Sigdal, Buskerud, Norway
References
(2017) Deposit Area 605 - 010. Skaug gruve. The Ore Database, Geological Survey of Norway.
 
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