Complete Copper Replacement Agate Ring Copper Replacement Agate as many pieces cannot be

as many pieces cannot be successfully finished without failure during shaping

Upper Peninsula material is less commonly encountered in mainstream lapidary circulation

Many are fractured

and natural pattern clarity after cutting from the original nodule form

As many traditional collecting locations continue to disappear

Complete Copper Replacement Agate Ring Copper Replacement Agate as many pieces cannot beThis 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