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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Hovedgruva, 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 Hovedgruva, Folldal Mines, Folldal, Innlandet, Norway
Data Identifiers
Mindat Occurrence Record ID:1310937
Long-form Identifier:1:3:1310937:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
5.0km (3.1 miles) ⓘNordre Geitryggen Mine, Folldal Mines, Folldal, Innlandet, Norway
5.8km (3.6 miles) ⓘNygruva, Folldal Mines, Folldal, Innlandet, Norway
8.8km (5.5 miles) ⓘSøndre Geitryggen Mines, Folldal Mines, Folldal, Innlandet, Norway
9.5km (5.9 miles) ⓘGrimsdalsgruva, Folldal Mines, Folldal, Innlandet, Norway
31.2km (19.4 miles) ⓘKolla, Oppdal, Trøndelag, Norway
48.5km (30.1 miles) ⓘKaltberget Mine, Kvikne, Tynset, Innlandet, Norway
48.7km (30.2 miles) ⓘOlkar Mine, Kvikne, Tynset, Innlandet, Norway
49.4km (30.7 miles) ⓘSøndre Berstjern Prospect, Kvikne Mines, Tynset, Innlandet, Norway
49.5km (30.7 miles) ⓘMidtre Berstjern Prospect, Kvikne Mines, Tynset, Innlandet, Norway
50.3km (31.3 miles) ⓘKojan Prospects, Kvikne Mines, Tynset, Innlandet, Norway
References
Geological Survey of Norway. The Ore Database. Deposit Area 439 - 009. Hovedgruva.
 
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