Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Opal from
Morais, Macedo de Cavaleiros, Bragança, Portugal


07532540017381753883399.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
06328530017570226958382.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
08685870017378842154237.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
07686690017379244514495.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
03769480017379243753020.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
02244980017570210961820.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
06087910017378842092048.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
08321620017379243313954.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
05730490017381753891239.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
08597440017570226959064.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
08541570017381753894578.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
00693580017416072307064.jpg
Opal

Morais, Macedo de Cavaleiros, Bragança, Portugal
Locality type:Parish
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Morais, Macedo de Cavaleiros, Bragança, Portugal
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:772575
Long-form Identifier:1:3:772575:3
GUID (UUID V4):0
Nearest other occurrences of Opal
67.7km (42.1 miles) ⓘJales Mines (Jales Mining Field), Alfarela de Jales, Vila Pouca de Aguiar, Vila Real, Portugal
79.5km (49.4 miles) ⓘPenouta mines, Viana do Bolo, Ourense, Galicia, Spain
81.9km (50.9 miles) ⓘPortugal 1 & 2 quarries, Malpartida, Malpartida e Vale de Coelha, Almeida, Guarda, Portugal
98.2km (61.0 miles) ⓘRatoeira quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
98.3km (61.1 miles) ⓘPenedo da Cabeça quarry, U.F. Sequeiros e Gradiz, Aguiar da Beira, Guarda, Portugal
References
Nunes, Rui (n.d.) Personal communication.
 
and/or  
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