Agate. Section through a specimen of agate from Middlefield, Scotland, UK. Agate is an aggregate of different forms of silica (SiO2) within a geode. A

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Agate. Section through a specimen of agate from Middlefield, Scotland, UK. Agate is an aggregate of different forms of silica (SiO2) within a geode. A geode forms when the silica precipitates from liquid onto the inside surface of an empty pocket in a host rock. Agate is a form of cryptocrystalline quartz. Specimen from the collections of the Natural History Museum, London.

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Size: 4012px × 4357px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: agate, background, black, chalcedony, cryptocrystalline, cut, cut-, cut-outs, cutout, cutouts, dioxide, fluorescence, geological, geology, middlefield, mineral, mineralogy, outs, polished, quartz, ring, scotland, section, silica, silicon, specimen