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
Nordre Geitryggen Mine, Folldal Mines, Folldal, Innlandet, 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 Nordre Geitryggen Mine, Folldal Mines, Folldal, Innlandet, Norway
Data Identifiers
Mindat Occurrence Record ID:1310965
Long-form Identifier:1:3:1310965:7
GUID (UUID V4):0
Nearest other occurrences of Biotite
5.0km (3.1 miles) ⓘHovedgruva, Folldal Mines, Folldal, Innlandet, Norway
10.6km (6.6 miles) ⓘNygruva, Folldal Mines, Folldal, Innlandet, Norway
13.8km (8.6 miles) ⓘSøndre Geitryggen Mines, Folldal Mines, Folldal, Innlandet, Norway
14.4km (9.0 miles) ⓘGrimsdalsgruva, Folldal Mines, Folldal, Innlandet, Norway
34.9km (21.7 miles) ⓘKolla, Oppdal, Trøndelag, Norway
45.6km (28.3 miles) ⓘKaltberget Mine, Kvikne, Tynset, Innlandet, Norway
45.9km (28.5 miles) ⓘOlkar Mine, Kvikne, Tynset, Innlandet, Norway
46.5km (28.9 miles) ⓘSøndre Berstjern Prospect, Kvikne Mines, Tynset, Innlandet, Norway
46.5km (28.9 miles) ⓘMidtre Berstjern Prospect, Kvikne Mines, Tynset, Innlandet, Norway
47.4km (29.4 miles) ⓘKojan Prospects, Kvikne Mines, Tynset, Innlandet, Norway
References
Geological Survey of Norway. The Ore Database. Deposit Area 439 - 012. Nordre Geiteryggen
 
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