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
Forbordfjellet, Stjørdal, Trøndelag, Norway


Locality type:Mountain
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 Forbordfjellet, Stjørdal, Trøndelag, Norway
Data Identifiers
Mindat Occurrence Record ID:651536
Long-form Identifier:1:3:651536:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
27.1km (16.8 miles) ⓘSandstad, Ytterøya, Levanger, Trøndelag, Norway
29.7km (18.4 miles) ⓘTrolla Quarry, Bymarka, Trondheim, Trøndelag, Norway
41.4km (25.7 miles) ⓘMannfjell Zinc Mine, Meråker, Trøndelag, Norway
53.3km (33.1 miles) ⓘLillefjell Mine, Meråker, Trøndelag, Norway
55.9km (34.8 miles) ⓘGilså Copper Mine, Meråker, Trøndelag, Norway
79.3km (49.3 miles) ⓘFinsåshøgda, Hessdalen, Holtålen, Trøndelag, Norway
79.6km (49.5 miles) ⓘRognfjell, Hessdalen, Holtålen, Trøndelag, Norway
80.2km (49.8 miles) ⓘDragset Mine (Dragset copper-zinc deposit), Meldal, Orkland, Trøndelag, Norway
91.9km (57.1 miles) ⓘMugg Mine, Nordgruve mining field, Røros copper mines, Røros, Trøndelag, Norway
97.3km (60.5 miles) ⓘKings Mine, Nordgruve mining field, Røros copper mines, Røros, Trøndelag, Norway
References
Carstens, Harald (1965) Contributions to the mineralogy of Norway. No. 32. Axinite in the Norwegian Caledonides. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 45 (4). p.397-415.
 
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