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The bold eye formation draws immediate attention
Upper Peninsula material is less commonly encountered in mainstream lapidary circulation
floating hematite plumes
This ring features a large chlorastrolite (Michigan “greenstone”) cabochon sourced from the Keweenaw Peninsula region of Lake Superior
As many traditional collecting locations continue to disappear
Complete Copper Replacement Agate Ring Copper Replacement Agate The bold eye formation drawsThis ring is built around a copper replacement agate sourced from naturally formed nodules found within amygdaloidal basalt in the Keweenaw Peninsula region of Michigans Upper Peninsula. These nodules form as discrete rounded structures within volcanic basalt, and only a small percentage contain material suitable for cutting once exposed. Many are fractured, partially mineralized, or structurally unstable due to the way secondary copper mineralization
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