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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Nepheline from
Bekkarfjordnes, Alta, Troms og Finnmark, Norway


Locality type:Pegmatite
Classification
Species:Nepheline
Formula:Na3K(Al4Si4O16)
Age information
Maximum recorded age:486 ± 10 Ma
Minimum recorded age:480 ± 10 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
1486 ± 10 to 480 ± 10 MaPaleozoic - K-Ar
Sample references:
1 -
Sturt, Brian A.; Miller, J.A.; Fitch, Frank J. (1967) The age of alkaline rocks from West Finnmark, Northern Norway, and their bearing on the dating of the Caledonian Orogeny. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 47 (3). 255-273
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Nepheline data
Locality Data:Click here to view Bekkarfjordnes, Alta, Troms og Finnmark, Norway
Data Identifiers
Mindat Occurrence Record ID:899174
Long-form Identifier:1:3:899174:4
GUID (UUID V4):0
Nearest other occurrences of Nepheline
10.0km (6.2 miles) ⓘStore Kufjord, Alta, Troms og Finnmark, Norway
10.3km (6.4 miles) ⓘSkarvevann Pegmatite, Alta, Troms og Finnmark, Norway
20.8km (12.9 miles) ⓘKlunneneset Dikes, Alta, Troms og Finnmark, Norway
28.5km (17.7 miles) ⓘLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
28.8km (17.9 miles) ⓘLillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
47.2km (29.3 miles) ⓘBrennhaugan, Hasvik, Troms og Finnmark, Norway
49.6km (30.8 miles) ⓘBreivikbotn, Hasvik, Troms og Finnmark, Norway
References
Sturt, Brian A.; Miller, J.A.; Fitch, Frank J. (1967) The age of alkaline rocks from West Finnmark, Northern Norway, and their bearing on the dating of the Caledonian Orogeny. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 47 (3). 255-273
 
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