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uneven banding
Copper Replacement Agate
The dual morel composition reflects two naturally occurring color and form variations found in Upper Peninsula fungal growth—interpreted here as a sculptural study of regional ecology rather than decorative motif
These characteristics require careful evaluation before cutting
Many stones of this type cannot survive full cabochon formation and are lost during the shaping process
Complete Copper Replacement Agate Ring Copper Replacement Agate uneven bandingThis 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