Close-up of an opal from Lightning Ridge, NSW, Australia. Opal is a hydrated amorphous form of silica. Because of its amorphous character, it is class

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Close-up of an opal from Lightning Ridge, NSW, Australia. Opal is a hydrated amorphous form of silica. Because of its amorphous character, it is classed as a mineraloid.

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Size: 4969px × 3517px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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