Rare Hematite Tube Copper Replacement Agate Copper Replacement Agate only two examples of this

only two examples of this formation type are known from the Keweenaw Peninsula

Chlorastrolite of this size is increasingly rare

or structurally unstable material that cannot be reliably cut into cabochons

Many stones of this type cannot survive full cabochon formation and are lost during the shaping process

Every element is fabricated by hand and assembled to emphasize material origin

Rare Hematite Tube Copper Replacement Agate Copper Replacement Agate only two examples of thisRare Hematite Tube Copper Replacement Agate Keweenaw Peninsula, Michigan An exceptionally uncommon Copper Replacement Agate containing preserved hematite tube structures and visible native copper mineralization. The dark tube like formations within this specimen are composed of hematite, while native copper occurs around portions of the tubes and can be observed within the agate itself, including a small but distinct area of copper banding. The