Rare Hematite Tube Copper Replacement Agate Copper Replacement Agate The visible inclusions and natural

The visible inclusions and natural fracture lines are not defects in presentation—they are part of the geological formation process of chlorastrolite

with all proportions built around its natural geometry

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

Chlorastrolite of this size is increasingly rare

Michigan mineral

Rare Hematite Tube Copper Replacement Agate Copper Replacement Agate The visible inclusions and naturalRare 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