Marquette Lake Superior Agate Ring Copper Replacement Agate This piece may not be

This piece may not be defined by bright colors or classic fortification patterns

internal fracture patterns

Others capture pattern

with all proportions determined by the cabochon’s natural geometry

An exceptionally uncommon Copper Replacement Agate containing preserved hematite tube structures and visible native copper mineralization

Marquette Lake Superior Agate Ring Copper Replacement Agate This piece may not beThis material is collected from a very limited number of shoreline locations in the Upper Peninsula region of Lake Superior. One of the primary collecting areas has been lost to shoreline erosion, and another is now seasonally buried under shifting sand, significantly reducing reliable access to fresh material. As a result, the usable yield from field recovery is extremely low. The majority of nodules found in these areas are not suitable for lapidary