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
Idria Mine (Idrija Mine), Idrija, Slovenia


Locality type:Mine
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 Idria Mine (Idrija Mine), Idrija, Slovenia
Data Identifiers
Mindat Occurrence Record ID:43957
Long-form Identifier:1:3:43957:6
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
71.9km (44.7 miles) ⓘRupa, Nötsch im Gailtal, Villach-Land District, Carinthia, Austria
72.7km (45.2 miles) ⓘA2 Highway tunnel (Falkenberg tunnel), Wölfnitz, Klagenfurt am Wörthersee, Carinthia, Austria
73.2km (45.5 miles) ⓘOswaldiberg tunnel (A10 Highway tunnel), Oswaldiberg, Villach, Carinthia, Austria
78.4km (48.7 miles) ⓘZeiselberg forestry road cut, Magdalensberg, Klagenfurt-Land District, Carinthia, Austria
88.9km (55.2 miles) ⓘTerpetzen, Trixen, Völkermarkt, Völkermarkt District, Carinthia, Austria
89.8km (55.8 miles) ⓘSchaumboden, Frauenstein, Sankt Veit an der Glan District, Carinthia, Austria
91.3km (56.7 miles) ⓘMagnetite deposit, Sonntagsberg, Frauenstein, Sankt Veit an der Glan District, Carinthia, Austria
92.9km (57.7 miles) ⓘZietnerkogel, Zwein, Kraig, Frauenstein, Sankt Veit an der Glan District, Carinthia, Austria
95.3km (59.2 miles) ⓘPirešica massif, Velenje, Slovenia
References
Bancroft, Peter, Zorz, Mirjan, Kobler, Gregor, Car, Joze (1991) Famous Mineral Localities: The Idria mines, Slovenia, Yugoslavia. The Mineralogical Record, 22 (3) 201-208pp.207-207
 
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