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
Verampio-Crego area, Premia, Verbano-Cusio-Ossola Province, Piedmont, Italy


Locality type:Occurrence
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 Verampio-Crego area, Premia, Verbano-Cusio-Ossola Province, Piedmont, Italy
Data Identifiers
Mindat Occurrence Record ID:995754
Long-form Identifier:1:3:995754:1
GUID (UUID V4):0
Nearest other occurrences of Opal
5.3km (3.3 miles) ⓘRencio quarries, Crodo gneiss quarries, Crodo, Verbano-Cusio-Ossola Province, Piedmont, Italy
11.4km (7.1 miles) ⓘGischi glacier (incl. Gischihorn), Binn, Goms, Valais, Switzerland
12.3km (7.6 miles) ⓘWanni glacier - Scherbadung area (Monte Cervandone), Binn, Goms, Valais, Switzerland
14.2km (8.9 miles) ⓘChummibort, Grengiols, Östlich Raron, Valais, Switzerland
15.3km (9.5 miles) ⓘRio Graia, Trontano, Verbano-Cusio-Ossola Province, Piedmont, Italy
15.8km (9.8 miles) ⓘHillehorn northeast slope, Chummibort, Grengiols, Östlich Raron, Valais, Switzerland
16.3km (10.1 miles) ⓘGrignaschi Quarry, Cosasca, Trontano, Verbano-Cusio-Ossola Province, Piedmont, Italy
17.8km (11.1 miles) ⓘEglio, Craveggia, Verbano-Cusio-Ossola Province, Piedmont, Italy
17.9km (11.1 miles) ⓘPiano del Lavonchio (Piano dei Lavonchi), Rio Vasca, Craveggia, Verbano-Cusio-Ossola Province, Piedmont, Italy
20.8km (12.9 miles) ⓘI Mondei (Ca' Mondei), Montescheno, Verbano-Cusio-Ossola Province, Piedmont, Italy
References
De Michele, V. (1974) Guida mineralogica d'Italia. Istituto Geografico De Agostini.
 
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