Opal specimens. Cut and polished forms of opals. Opals are a form of hydrated silica glass. They are not truly crystalline, and are classified as mine

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Opal specimens. Cut and polished forms of opals. Opals are a form of hydrated silica glass. They are not truly crystalline, and are classified as mineraloids. These specimens are from Queensland, Australia.

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Size: 5421px × 3223px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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