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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Stilpnomelane from
Hedrum Quarry, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway


Locality type:Quarry
Classification
Species:Stilpnomelane
Formula:K4Fe482+[Si64Al8]O164(OH)52 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilpnomelane data
Locality Data:Click here to view Hedrum Quarry, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway
Data Identifiers
Mindat Occurrence Record ID:680779
Long-form Identifier:1:3:680779:5
GUID (UUID V4):0
Nearest other occurrences of Stilpnomelane
6.8km (4.2 miles) ⓘBratthagen 1, Lågendalen, Hedrum, Larvik Commune, Vestfold, Norway
11.3km (7.0 miles) ⓘVindalsvingen, Vindal, Vesterøya, Sandefjord, Vestfold, Norway
11.3km (7.0 miles) ⓘHusebyåsen prospect, Vesterøya, Sandefjord, Vestfold, Norway
11.9km (7.4 miles) ⓘBuer, Vesterøya, Sandefjord, Vestfold, Norway
13.3km (8.3 miles) ⓘJohs Nilsens Quarry, Tvedalen, Larvik Commune, Vestfold, Norway
18.0km (11.2 miles) ⓘStokke Quarry, Stokke, Sandefjord, Vestfold, Norway
19.1km (11.9 miles) ⓘE18 roadcuts, Slevolden, Porsgrunn, Telemark, Norway
19.3km (12.0 miles) ⓘKjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norway
33.7km (20.9 miles) ⓘBreigangen Mine, Fossum Iron Mines, Skien, Telemark, Norway
43.5km (27.0 miles) ⓘValberg Quarry, Valberg, Kragerø, Telemark, Norway
References
Larsen, Alf Olav; Andersen, Frode; Dahlgren, Sven; Larsen, Knut Edvard; Burvald, Ingulv - Ed. (2010) The Langesundsfjord - History, geology, pegmatites, minerals. Bode Verlag Gmbh. 240 pp.
 
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