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
Holmsen Mine (Gudrun Mine), Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, 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 Holmsen Mine (Gudrun Mine), Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
Data Identifiers
Mindat Occurrence Record ID:1297688
Long-form Identifier:1:3:1297688:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.4km (0.3 miles) ⓘNy-Sulitjelma Mine, Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
1.4km (0.9 miles) ⓘHankabakken Mine, Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
2.6km (1.6 miles) ⓘGiken Mine, Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
3.8km (2.4 miles) ⓘCharlotta Mine, Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
4.9km (3.0 miles) ⓘMons Petter Mine, Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
7.9km (4.9 miles) ⓘJakobsbakken Mines, Sulitjelma Copper Mines, Sulitjelma, Fauske, Nordland, Norway
29.7km (18.5 miles) ⓘRishaugfjellet Molybdenum Prospects, Fauske, Nordland, Norway
31.0km (19.3 miles) ⓘHarelifjell, Sørfold, Nordland, Norway
46.7km (29.0 miles) ⓘLeirjordfall Molybdenum Mine, Saltdal, Nordland, Norway
48.1km (29.9 miles) ⓘSørskardvatnet Tungsten Deposit, Fauske, Nordland, Norway
References
Geological Survey of Norway. The Ore Database. Deposit Area 1841 - 006. Gudrun.
 
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