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Copper Replacement Agate
These nodules form as discrete rounded structures within volcanic basalt
Every angle reveals new details: swirling fortifications
This ring features a large chlorastrolite (Michigan “greenstone”) cabochon sourced from the Keweenaw Peninsula region of Lake Superior
Upper Peninsula material is less commonly encountered in mainstream lapidary circulation
Complete Copper Replacement Agate Ring Copper Replacement Agate Copper Replacement AgateThis 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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