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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Fluorite from
Kristiansen Quarry (Bånkall Quarry), Bånkall, Grorud, Oslo, Norway


Locality type:Quarry
Classification
Species:Fluorite
Formula:CaF2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Fluorite data
Locality Data:Click here to view Kristiansen Quarry (Bånkall Quarry), Bånkall, Grorud, Oslo, Norway
Data Identifiers
Mindat Occurrence Record ID:84334
Long-form Identifier:1:3:84334:4
GUID (UUID V4):0
Nearest other occurrences of Fluorite
2.5km (1.6 miles) ⓘHuken Quarry, Grorud, Oslo, Norway
2.6km (1.6 miles) ⓘBjønndalen Quarry, Nittedal, Akershus, Norway
4.1km (2.6 miles) ⓘRødtvedt, Grorud, Oslo, Norway
5.5km (3.4 miles) ⓘTonsenplassen, Oslomarka, Oslo, Norway
8.3km (5.1 miles) ⓘSandbekken, Løvenstad, Rælingen, Akershus, Norway
9.0km (5.6 miles) ⓘRotnes Cu Prospect, Nittedal, Akershus, Norway
11.2km (7.0 miles) ⓘAkersberg Mines, St. Hanshaugen, Oslo, Norway
11.3km (7.0 miles) ⓘVinsrud Fluorite Mine, Hakadal, Nittedal, Akershus, Norway
13.9km (8.7 miles) ⓘKirkeby Copper Mine, Kirkeby Copper Mines, Hakadal, Nittedal, Akershus, Norway
15.6km (9.7 miles) ⓘDelebekken Roadcut, Oslomarka, Oslo, 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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