BY ANTOINETTE RAHN
This agate from Patagonia helps illustrate the allure of agates. The half banded agate prompts consideration of three questions about agate genesis: How does the pattern of concentric bands form? What is the nature and origin of the radial channels that connect the exterior of the nodule with the interior (as indicated by arrows)? And how do the bands attain different intense colors? (JOE DEHMER)
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About Rock&Gem Magazine
Rock & Gem May 2019,
Volcanic Views : Remnants of Eruptions,
Artisanal Mining : A Complex Industry,
HEMATITE : An Influential Mineral Iron Ore,
And More.....