![](http://www.alamy.com/thumbs/6/2A380CF5-B805-4AB5-BEB4-33D4DE5EDF44/DTGN22.jpg)
Agate
A cut and polished section of blue agate from Idar-Oberstein, Germany. Agate (silicon dioxide) is a cryptocrystalline quartz.
Size: 3076px × 2588px
Photo credit: © Natural History Museum, London / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: agate, blue, chalcedony, cryptocrystalline, decorative, dioxide, mineral, pattern, polished, quartz, shot, silicate, silicon, studio, studioshot, swirl, tectosilicate