Cryptocrystalline Agate
by Natural History Museum, London/science Photo Library
Title
Cryptocrystalline Agate
Artist
Natural History Museum, London/science Photo Library
Medium
Photograph - Photograph
Description
Cryptocrystalline agate (black) and quartz (white). 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 approximately 10 x 10 centimetres.
Uploaded
October 4th, 2018
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