Concentric bands of microcrystalline quartz are known as Banded Agate. A semi-precious stone the bands are caused by impurities, in this case copper

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Concentric bands of microcrystalline quartz are known as Banded Agate. A semi-precious stone the bands are caused by impurities, in this case green copper and red iron.

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Size: 6000px × 4000px
Location: Anglesey, UK
Photo credit: © Nick Greaves / Alamy / Afripics
License: Licensed
Model Released: No

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