Copper Replacement Eye Agate Copper Replacement Agate One-of-a-kind collector specimen

One-of-a-kind collector specimen

One of only two known examples of this formation type

These nodules form as discrete rounded structures within volcanic basalt

and hand fabrication rather than uniform production

Natural Hematite Plume Eye Agate

Copper Replacement Eye Agate Copper Replacement Agate One-of-a-kind collector specimenCopper Replacement Eye Agate Copper Replacement Eye Agate Lake Superior's Gaze Some agates capture color. Others capture pattern. Rarely does a specimen capture attention quite like this Copper Replacement Eye Agate. At the heart of this remarkable Lake Superior agate lies a series of perfectly formed concentric eyes, each surrounded by impossibly fine fortification banding created over billions of years within the volcanic bedrock of Michigan's Upper