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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Chalcedony from
Těškov quarry (Lom Knezska hora), Těškov, Rokycany District, Plzeň Region, Czech Republic


Locality type:Quarry
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Těškov quarry (Lom Knezska hora), Těškov, Rokycany District, Plzeň Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:348291
Long-form Identifier:1:3:348291:9
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
13.6km (8.4 miles) ⓘKristianie mine, Ejpovice, Rokycany District, Plzeň Region, Czech Republic
23.4km (14.5 miles) ⓘKrušná Hora, Hudlice, Beroun District, Central Bohemian Region, Czech Republic
44.2km (27.4 miles) ⓘNučice deposit, Nučice, Prague-West District, Central Bohemian Region, Czech Republic
57.5km (35.7 miles) ⓘRadvanka quarry, Hejná, Klatovy District, Plzeň Region, Czech Republic
74.7km (46.4 miles) ⓘKorozluky magmatic rock occurrence (Kolosoruk magmatic rock occurrence; Kolloseruk magmatic rock occurrence), Korozluky, Most District, Ústí nad Labem Region, Czech Republic
75.3km (46.8 miles) ⓘOpal occurrence, Opal occurrence, Lužice, Most District, Ústí nad Labem Region, Czech Republic
75.8km (47.1 miles) ⓘAhníkov pyroxenite outcrop, Ahníkov, Málkov, Chomutov District, Ústí nad Labem Region, Czech Republic
77.5km (48.2 miles) ⓘBlahuňov, Místo, Chomutov District, Ústí nad Labem Region, Czech Republic
77.6km (48.2 miles) ⓘHradiště, Klášterec nad Ohří, Chomutov District, Ústí nad Labem Region, Czech Republic
79.6km (49.5 miles) ⓘNadějná, Měděnec, Chomutov District, Ústí nad Labem Region, Czech Republic
References
Janouš, F. (1995): Minerály z Kněží hory u Těškova (okres Rokycany). Minerál, 3 (6), 367-369.
 
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