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
Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy


03472670017272017445818.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
05982120017363267501519.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
09428780017362966048726.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
08418760017272003965631.jpg
Opal-AN, etc.

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
03241780017362966077196.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
07293310017362966081445.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
09428780017362966048726.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
06710750017493523403343.jpg
Opal-AN, etc.

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
03472670017272017445818.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
08731080017272003883475.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
02580710017362966129787.jpg
Opal

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
08418760017272003965631.jpg
Opal-AN, etc.

Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz2
- var Smoky Quartz2
Albite2
Aeschynite-(Y)2
Mica Group2
Thortveitite2
Orthoclase1
Bavenite1
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:985677
Long-form Identifier:1:3:985677:6
GUID (UUID V4):0
Nearest other occurrences of Opal
3.3km (2.1 miles) ⓘMont'Orfano (Montorfano), Mergozzo, Verbano-Cusio-Ossola Province, Piedmont, Italy
11.6km (7.2 miles) ⓘNibbio-Val Faera (Nibbio-Val Fredda) pegmatites, Nibbio, Mergozzo, Verbano-Cusio-Ossola Province, Piedmont, Italy
16.0km (9.9 miles) ⓘAlzo, Pella, Novara Province, Piedmont, Italy
24.6km (15.3 miles) ⓘRio Graia, Trontano, Verbano-Cusio-Ossola Province, Piedmont, Italy
24.9km (15.5 miles) ⓘGrignaschi Quarry, Cosasca, Trontano, Verbano-Cusio-Ossola Province, Piedmont, Italy
25.1km (15.6 miles) ⓘEglio, Craveggia, Verbano-Cusio-Ossola Province, Piedmont, Italy
25.8km (16.1 miles) ⓘPiano del Lavonchio (Piano dei Lavonchi), Rio Vasca, Craveggia, Verbano-Cusio-Ossola Province, Piedmont, Italy
27.1km (16.8 miles) ⓘI Mondei (Ca' Mondei), Montescheno, Verbano-Cusio-Ossola Province, Piedmont, Italy
30.3km (18.8 miles) ⓘPuricelli Quarry, Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy
30.5km (18.9 miles) ⓘLaghetto Quarry, Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy
References
Albertini, Claudio (1983) Famous Mineral Localities: Baveno, Italy. The Mineralogical Record, 14 (3) 157-168
 
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