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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Columbite-(Fe)-Columbite-(Mn) Series from
Bakstevalåsen, Gunhildrud, Øvre Eiker, Buskerud, Norway


Locality type:Pegmatite
Classification
Species:'Columbite-(Fe)-Columbite-(Mn) Series' (not an IMA approved species)
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Columbite-(Fe)-Columbite-(Mn) Series data
Locality Data:Click here to view Bakstevalåsen, Gunhildrud, Øvre Eiker, Buskerud, Norway
Data Identifiers
Mindat Occurrence Record ID:477217
Long-form Identifier:1:3:477217:0
GUID (UUID V4):0
Nearest other occurrences of Columbite-(Fe)-Columbite-(Mn) Series
25.1km (15.6 miles) ⓘSætersbergåsen, Modum, Buskerud, Norway
42.6km (26.5 miles) ⓘSpro pegmatite, Nesodden, Akershus, Norway
54.1km (33.6 miles) ⓘCappelen Quarry, Søve Mines, Nome, Telemark, Norway
54.1km (33.6 miles) ⓘSøve Mines, Nome, Telemark, Norway
54.2km (33.7 miles) ⓘHydro Quarry, Nome, Telemark, Norway
54.9km (34.1 miles) ⓘTufte Quarry, Søve Mines, Nome, Telemark, Norway
59.3km (36.8 miles) ⓘÅnnerud (Ånnerød), Våler, Østfold, Norway
67.2km (41.7 miles) ⓘKarlshus Mine, Råde, Østfold, Norway
67.4km (41.9 miles) ⓘHalvorsrød, Råde, Østfold, Norway
72.0km (44.7 miles) ⓘGjerdingselva, Lunner, Akershus, Norway
References
Hurum, Jørn H., Jahren, J., Berg, Hans-Jørgen, Bjerkgaard, T. (1997) En eksotisk pegmatitt i kambrosiluren ved Eikeren, Buskerud [An unusual pegmatite from the Eikeren area, South-eastern Norway - a preliminary report], in Kongsberg Mineralsymposium 1997. STEIN. Nordisk magasin for populær geologi, 24 (3) 125-127
Hurum, Jørn H., Jahren, J., Berg, Hans-Jørgen, Bjerkgård, T. (1997) En eksotisk pegmatitt i kambrosiluren ved Eikeren, Buskerud [An unusual pegmatite from the Eikeren area, South-eastern Norway - a preliminary report]. Norsk Bergverksmuseum Skrift, 12. 31-33 as niobitt (columbitt), preliminary analysis
 
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