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each surrounded by impossibly fine fortification banding created over billions of years within the volcanic bedrock of Michigan's Upper Peninsula
Upper Peninsula material is less commonly encountered in mainstream lapidary circulation
Copper Replacement Eye Agate – Lake Superior's Gaze
or structurally unstable due to the way secondary copper mineralization replaces the original amygdaloidal cavities over time
At the heart of this remarkable Lake Superior agate lies a series of perfectly formed concentric eyes
Keweenaw Agate with Feldspar Eye Copper Replacement Agate each surrounded by impossibly fineKeweenaw Agate with a Feldspar Eye!! 26x19mm
US$ 499.50
US$ 650.00
US$ 1600.00
US$ 1600.00
US$ 1600.00