Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Magnetite from
Kristiansen Quarry (Bånkall Quarry), Bånkall, Grorud, Oslo, Norway


Locality type:Quarry
Classification
Species:Magnetite
Formula:Fe2+Fe23+O4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnetite data
Locality Data:Click here to view Kristiansen Quarry (Bånkall Quarry), Bånkall, Grorud, Oslo, Norway
Data Identifiers
Mindat Occurrence Record ID:84369
Long-form Identifier:1:3:84369:0
GUID (UUID V4):0
Nearest other occurrences of Magnetite
1.9km (1.2 miles) ⓘRomsås, Grorud, Oslo, Norway
2.5km (1.6 miles) ⓘHuken Quarry, Grorud, Oslo, Norway
2.6km (1.6 miles) ⓘBjønndalen Quarry, Nittedal, Akershus, Norway
5.5km (3.4 miles) ⓘTonsenplassen, Oslomarka, Oslo, Norway
6.9km (4.3 miles) ⓘSandermosen, Maridalen, Oslomarka, Oslo, Norway
7.0km (4.3 miles) ⓘNMM/L1 micrometeorite, Skedsmo, Lillestrøm, Akershus, Norway
9.0km (5.6 miles) ⓘRotnes Cu Prospect, Nittedal, Akershus, Norway
17.5km (10.9 miles) ⓘHolmlia, Søndre Nordstrand, Oslo, Norway
19.6km (12.2 miles) ⓘHaga Prospects, Bærum (Baerum), Akershus, Norway
21.0km (13.0 miles) ⓘVardeåsen Pb prospect, Nannestad, Akershus, Norway
References
Oftedal, Ivar; Sæbø, Per Christian (1963) Contributions to the mineralogy of Norway. No. 18. Classification of some Norwegian members of the Helvine Group. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (3). 405-409
Kvamsdal, Lars O. (1998) Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet [The minerals from the nordmarkite and grefsensyenites in the Oslo region area]. Privat publication, AS Merkur-Trykk, Oslo. p.1-72.
 
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