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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Opal from
Borovec (Borowetz; Borowitz?), Štěpánov nad Svratkou, Žďár nad Sázavou District, Vysočina Region, Czech Republic


Locality type:Deposit
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Borovec (Borowetz; Borowitz?), Štěpánov nad Svratkou, Žďár nad Sázavou District, Vysočina Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:322015
Long-form Identifier:1:3:322015:3
GUID (UUID V4):0
Nearest other occurrences of Opal
8.0km (5.0 miles) ⓘRožná pegmatite (Rozna; Roschna), Rožná, Žďár nad Sázavou District, Vysočina Region, Czech Republic
8.5km (5.3 miles) ⓘVěžná I pegmatite, Věžná, Žďár nad Sázavou District, Vysočina Region, Czech Republic
8.6km (5.3 miles) ⓘVěžná serpentinite quarry, Věžná, Žďár nad Sázavou District, Vysočina Region, Czech Republic
33.5km (20.8 miles) ⓘSeč quarry, Rudice, Blansko District, South Moravian Region, Czech Republic
44.2km (27.5 miles) ⓘSerpentinite occurrence, Nová Ves, Brno-Country District, South Moravian Region, Czech Republic
46.5km (28.9 miles) ⓘU Pustého Mlýna Quarry, Hrubšice, Ivančice, Brno-Country District, South Moravian Region, Czech Republic
48.7km (30.3 miles) ⓘResidual rocks outcrop, Řípov, Třebíč, Třebíč District, Vysočina Region, Czech Republic
49.5km (30.8 miles) ⓘDukovany opal occurrence, Dukovany, Třebíč District, Vysočina Region, Czech Republic
73.9km (45.9 miles) ⓘKunětická hill, Ráby, Pardubice District, Pardubice Region, Czech Republic
87.0km (54.0 miles) ⓘŻmijowiec, Kletno, Gmina Stronie Śląskie, Kłodzko County, Lower Silesian Voivodeship, Poland
References
 
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