Agate is a photograph by James Stevenson/science Photo Library which was uploaded on September 25th, 2018.
Agate
A polished cross-section of a geode. It is composed of agate, a form of chalcedony that has variegated bands or zones. Chalcedony is an opaque... more
Title
Agate
Artist
James Stevenson/science Photo Library
Medium
Photograph
Description
A polished cross-section of a geode. It is composed of agate, a form of chalcedony that has variegated bands or zones. Chalcedony is an opaque microcrystalline variety of the mineral quartz (silicon oxide). Any colours it might have arise from the presence of various impurities. The multi-coloured concentric bands, visible here, represent successive layers of precipitation onto the interior surface of a rounded cavity within rock.
Uploaded
September 25th, 2018
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