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
Kings Mine, Nordgruve mining field, Røros copper mines, Røros, Trøndelag, 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 Kings Mine, Nordgruve mining field, Røros copper mines, Røros, Trøndelag, Norway
Data Identifiers
Mindat Occurrence Record ID:1309526
Long-form Identifier:1:3:1309526:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.9km (1.8 miles) ⓘLergruvbakken, Nordgruve mining field, Røros copper mines, Røros, Trøndelag, Norway
5.5km (3.4 miles) ⓘMugg Mine, Nordgruve mining field, Røros copper mines, Røros, Trøndelag, Norway
12.2km (7.6 miles) ⓘOld Storwartz Mine, Storwartz mining field, Røros copper mines, Røros, Trøndelag, Norway
12.9km (8.0 miles) ⓘStorwartz Mine, Storwartz mining field, Røros copper mines, Røros, Trøndelag, Norway
14.2km (8.8 miles) ⓘNye Solskinn Mine, Storwartz mining field, Røros copper mines, Røros, Trøndelag, Norway
14.5km (9.0 miles) ⓘGamle Solskinn Mine, Storwartz mining field, Røros copper mines, Røros, Trøndelag, Norway
17.7km (11.0 miles) ⓘRognfjell, Hessdalen, Holtålen, Trøndelag, Norway
19.2km (11.9 miles) ⓘFinsåshøgda, Hessdalen, Holtålen, Trøndelag, Norway
46.4km (28.9 miles) ⓘSegen Gottes Mine, Kvikne Mines, Tynset, Innlandet, Norway
46.5km (28.9 miles) ⓘStorbekken Prospect, Kvikne Mines, Tynset, Innlandet, Norway
References
Geological Survey of Norway. The Ore Database. Deposit Area 1640 - 052. Kongens gruve.
 
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