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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Uraninite from
Princ Evžen deposit, Potůčky Deposit, Potůčky, Karlovy Vary District, Karlovy Vary Region, Czech Republic


Locality type:Deposit
Classification
Species:Uraninite
Formula:UO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Uraninite data
Locality Data:Click here to view Princ Evžen deposit, Potůčky Deposit, Potůčky, Karlovy Vary District, Karlovy Vary Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:537463
Long-form Identifier:1:3:537463:2
GUID (UUID V4):0
Nearest other occurrences of Uraninite
0.9km (0.6 miles) ⓘProspect No. 3, Stran (Ziegenschacht), Potůčky, Karlovy Vary District, Karlovy Vary Region, Czech Republic
1.7km (1.0 miles) ⓘGeorg Wagsfort Mine, Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany
2.2km (1.4 miles) ⓘSchwarzwasser adit (Shaft 59), Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany
2.4km (1.5 miles) ⓘSchaar Shaft, Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany
6.1km (3.8 miles) ⓘSt. Margarethe Mine (Otto-Stollen; Shaft 23), Breitenbrunn, Erzgebirgskreis, Saxony, Germany
6.9km (4.3 miles) ⓘRote Grube mine, Sosa, Eibenstock, Erzgebirgskreis, Saxony, Germany
7.6km (4.7 miles) ⓘJeroným Mine, Abertamy, Karlovy Vary District, Karlovy Vary Region, Czech Republic
7.7km (4.8 miles) ⓘFällbach Shaft, Antonsthal, Breitenbrunn, Erzgebirgskreis, Saxony, Germany
8.9km (5.5 miles) ⓘShaft 235 (Weißer Hirsch mine), Crandorf, Schwarzenberg, Erzgebirgskreis, Saxony, Germany
9.0km (5.6 miles) ⓘPöhla-Tellerhäuser Mine, Pöhla, Schwarzenberg, Erzgebirgskreis, Saxony, Germany
References
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
Sejkora, Jiří; Biagioni, Cristian; Makovicky, Emil (2026) Selenodantopaite, Ag5Bi13Se22, a new member of the pavonite homologous series from Potůčky, Czech Republic. Mineralogical Magazine, 90 (2). p.315-323. doi:10.1180/mgm.2025.10111
 
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