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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Plagioclase from
Libčice, Nový Knín, Příbram District, Central Bohemian Region, Czech Republic


Locality type:Village
Classification
Species:'Plagioclase' (not an IMA approved species)
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Plagioclase data
Locality Data:Click here to view Libčice, Nový Knín, Příbram District, Central Bohemian Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:352334
Long-form Identifier:1:3:352334:6
GUID (UUID V4):0
Nearest other occurrences of Plagioclase
19.8km (12.3 miles) ⓘRovina, Hlásná Třebaň, Beroun District, Central Bohemian Region, Czech Republic
30.2km (18.7 miles) ⓘNučice deposit, Nučice, Prague-West District, Central Bohemian Region, Czech Republic
35.8km (22.2 miles) ⓘKrušná Hora, Hudlice, Beroun District, Central Bohemian Region, Czech Republic
38.4km (23.9 miles) ⓘChlum Hill, Sepekov, Písek District, South Bohemian Region, Czech Republic
47.8km (29.7 miles) ⓘMalovidy, Vracovice, Benešov District, Central Bohemian Region, Czech Republic
52.0km (32.3 miles) ⓘPacova Hill quarry, Dolní Hořice, Tábor District, South Bohemian Region, Czech Republic
54.2km (33.7 miles) ⓘTábor meteorite (Strkov meteorite; Kravín meteorite), Strkov, Planá nad Lužnicí, Tábor District, South Bohemian Region, Czech Republic
55.1km (34.2 miles) ⓘKristianie mine, Ejpovice, Rokycany District, Plzeň Region, Czech Republic
60.7km (37.7 miles) ⓘHůrky, Čistá ring, Čistá, Rakovník District, Central Bohemian Region, Czech Republic
61.3km (38.1 miles) ⓘBřezina pegmatite, Moldanubian Zone pegmatites, Vlastějovice, Kutná Hora District, Central Bohemian Region, Czech Republic
References
Šrein, V., Pivec, E., Langrová, A..: Petrologie a mineralogie zlatonosného ložiska Libč
ice u Nového Knína. Bulletin mineralogicko-petrografického oddě
lení Národního muzea v Praze, 1995, roč
. 3, s. 188-195.
 
and/or  
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