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
Heggur tunnel (Fjøra-Tafjord tunnel), Tafjord, Norddal, Fjord, Møre og Romsdal, Norway


Locality type:Tunnel
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 Heggur tunnel (Fjøra-Tafjord tunnel), Tafjord, Norddal, Fjord, Møre og Romsdal, Norway
Data Identifiers
Mindat Occurrence Record ID:1990961
Long-form Identifier:1:3:1990961:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
42.0km (26.1 miles) ⓘFramruste, Skjåk, Innlandet, Norway
51.4km (31.9 miles) ⓘØyberget Hydropower Station, Dønfoss, Skjåk, Innlandet, Norway
57.9km (36.0 miles) ⓘFestøya, Ørsta, Møre og Romsdal, Norway
72.1km (44.8 miles) ⓘNogva eclogite outcrop, Flemsøya-Skuløya, Haram, Ålesund, Møre og Romsdal, Norway
72.7km (45.2 miles) ⓘNetoseter Quarry, Bøverdalen, Lom, Innlandet, Norway
74.4km (46.2 miles) ⓘRødsand Iron Mines, Nesset, Molde, Møre og Romsdal, Norway
75.0km (46.6 miles) ⓘBardane, Fjørtofta, Haram, Ålesund, Møre og Romsdal, Norway
81.8km (50.8 miles) ⓘUlsteinvik, Ulstein, Møre og Romsdal, Norway
83.1km (51.6 miles) ⓘLote Tunnel, Nordfjordeid, Eid, Stad, Vestland, Norway
90.4km (56.2 miles) ⓘTodalshaug, Surnadal, Møre og Romsdal, Norway
References
Brastad, Kjartan (1984) Julgoldite from Tafjord, Sunnmøre. Contribution to the Mineralogy of Norway, No. 67. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 64 (3) 251-255
 
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