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An exceptionally uncommon Copper Replacement Agate containing preserved hematite tube structures and visible native copper mineralization
The bold eye formation draws immediate attention
Many are fractured
and another is now seasonally buried under shifting sand
Complete Copper Replacement Agate Ring Copper Replacement Agate An exceptionally uncommon Copper ReplacementThis 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