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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Bertrandite from
Ostředek (Mittelberg), Šumperk, Šumperk District, Olomouc Region, Czech Republic


Locality type:Quarry
Classification
Species:Bertrandite
Formula:Be4(Si2O7)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bertrandite data
Locality Data:Click here to view Ostředek (Mittelberg), Šumperk, Šumperk District, Olomouc Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:705106
Long-form Identifier:1:3:705106:7
GUID (UUID V4):0
Nearest other occurrences of Bertrandite
9.2km (5.7 miles) ⓘRasovna (Schinderhübl), Maršíkov (Marchendorf), Velké Losiny, Šumperk District, Olomouc Region, Czech Republic
10.1km (6.3 miles) ⓘStřelecký důl (Scheibengraben), Maršíkov (Marchendorf), Velké Losiny, Šumperk District, Olomouc Region, Czech Republic
73.5km (45.7 miles) ⓘMt. Szklana Mine (Szklary pegmatite), Szklary, Gmina Ząbkowice Śląskie, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
77.8km (48.3 miles) ⓘRožná pegmatite (Rozna; Roschna), Rožná, Žďár nad Sázavou District, Vysočina Region, Czech Republic
References
Procházka, J. (1969): Autunit, Bertrandit A Bismutit Z Pegmatitu Od Šumperka. Acta Musei Moraviae, Sci. nat., 54, 31-44. (in Czech with Germany summary)
 
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