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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Pyrrhotite from
Metsämonttu mine, Kisko, Salo, Southwest Finland, Finland


Locality type:Mine
Classification
Species:Pyrrhotite
Formula:Fe1-xS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrrhotite data
Locality Data:Click here to view Metsämonttu mine, Kisko, Salo, Southwest Finland, Finland
Data Identifiers
Mindat Occurrence Record ID:56258
Long-form Identifier:1:3:56258:2
GUID (UUID V4):0
Nearest other occurrences of Pyrrhotite
1.2km (0.8 miles) ⓘAijala, Kisko, Salo, Southwest Finland, Finland
6.8km (4.2 miles) ⓘNyckeln deposit (Brödtorp deposit), Pohja, Raseborg, Uusimaa, Finland
10.9km (6.8 miles) ⓘIilijärvi, Kisko, Salo, Southwest Finland, Finland
22.4km (13.9 miles) ⓘTräskböle, Perniö, Salo, Southwest Finland, Finland
39.0km (24.2 miles) ⓘNorrlammala calcite marble deposit, Kimitoön (Kemiönsaari), Southwest Finland, Finland
39.4km (24.5 miles) ⓘPalmottu U deposit, Palmottu Lake, Lohja, Uusimaa, Finland
41.0km (25.5 miles) ⓘTytyri mine, Lohja, Uusimaa, Finland
44.7km (27.8 miles) ⓘLövböle, Kimitoön Island, Kimitoön (Kemiönsaari), Southwest Finland, Finland
48.2km (30.0 miles) ⓘTupala deposit, Somero, Southwest Finland, Finland
58.9km (36.6 miles) ⓘRiukka prospect, Somero, Southwest Finland, Finland
References
Geological Survey of Finland Metsämonttu - ZINC Database
Hokka, J.; Lahtinen, R. (2025) Facies architecture, ore genesis (Zn-Pb-Cu) and structural evolution of the Paleoproterozoic Aijala–Metsämonttu area, SW Finland. Ore Geology Reviews, 184. 106707 doi:10.1016/j.oregeorev.2025.106707
 
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