Agua Nueva agate. Agate is an aggregate of different forms of silica (SiO2) that have formed concentric bands within a geode. A geode forms when the s

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Agua Nueva agate. Agate is an aggregate of different forms of silica (SiO2) that have formed concentric bands within a geode. A geode forms when the silica precipitates from liquid onto the inside surface of an empty pocket in a host rock. Specimen from Agua Nueva Ranch, Chihuahua, Mexico, measuring 15 centimetres in length.

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Size: 3222px × 2712px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1800s, 19th, animal, aquatic, artwork, australia, australian, biological, biology, century, drawing, fauna, fish, georgess, illustration, king, nature, neil, robert, sound, watercolor, watercolour, western, wildlife, zoological, zoology