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Opal Gallery

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Opal (Var: Milk Opal) : SiO2·nH2O

Belas, Luanda Province, Angola

Sample with 7x8x9cm - July of 1974
 © Martins da PedraPhoto ID: 53656    View Count: 861

Opal (Var: Wood Opal) : SiO2·nH2O

Belas, Luanda Province, Angola

Sample with 10x6x4cm - July of 1974
 © Martins da PedraPhoto ID: 53653    View Count: 687

Opal (Var: Wood Opal) : SiO2·nH2O

Belas, Luanda Province, Angola

Sample with 5x4x2cm - July of 1974
 © Martins da PedraPhoto ID: 53655    View Count: 630

Opal (Var: Wood Opal) : SiO2·nH2O

Belas, Luanda Province, Angola

Sample with 8x6x4cm - July of 1974
 © Martins da PedraPhoto ID: 103566    View Count: 466

Opal : SiO2·nH2O

Rio de los Sauces, Mina Clavero, Córdoba, Argentina

Milk Opal. Intense fluorescence yellow-green (LW UV). Contains traces of uranium.
Photo ID: 131414    View Count: 451

Opal (Var: Wood Opal) : SiO2·nH2O

Colón, Entre Ríos, Argentina

Petrified fruit cut and polished. Size of the specimen on the left: 5.0 x 4.0 cm. Size of the specimen on the right: 4.5 x 3.9 cm.
 © JCLodovichiPhoto ID: 22616    View Count: 1432

Opal : SiO2·nH2O

Grawin Opal Field, Grawin, Finch Co., New South Wales, Australia

Precious opal with a polished face. Size as per scale bar.
 © crocoite.comPhoto ID: 216791    View Count: 143

Precious Opal (Var: Black Opal) : SiO2·nH2O

Lightning Ridge, Finch Co., New South Wales, Australia

Here is a gem black opal in the colours red,blue,green. The size is 10x9mm. Photo, John Nijhuis.
 © J.NPhoto ID: 45172    View Count: 932

Opal : SiO2·nH2O

Lightning Ridge, Finch Co., New South Wales, Australia

Transparent, "jelly opal" formed in red sandstone from this world class opal locality. Here we have a nicely presented opal pocket in matrix, flashign colors at you as you turn it in light. It is extremely gemmy and transparent! 5.6 x 4.5 x 3.2 cm

 © Rob LavinskyPhoto ID: 39563    View Count: 830

Opal (Var: Precious Opal) : SiO2·nH2O

Lightning Ridge, Finch Co., New South Wales, Australia

Field of view: 10 mm
Photo and collection Antonio Borrelli
 © Antonio BorrelliPhoto ID: 58557    View Count: 795
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