Marquette Lake Superior Agate Ring Copper Replacement Agate but even at this level

but even at this level it remains unpredictable to work with

internal fracture patterns

Some agates capture color

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

Size 7 can be sized to an 8

Marquette Lake Superior Agate Ring Copper Replacement Agate but even at this levelThis 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