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which is 14k gold
and striking eye formations create a display piece that is equally at home in a serious mineral collection or showcased as a natural work of art
specimens like this are becoming increasingly difficult to recover
Each cabochon requires extended cutting time due to the stone’s variability in hardness and internal structure
As the material separated and solidified
Rare Copper Replacement Agate Copper Replacement Agate which is 14k goldCopper Replacement Agate Keweenaw Peninsula, Michigan A striking Copper Replacement Agate featuring a well defined copper structure surrounded by delicate banding. Soft layers of cream, and warm peach tones create a natural pattern that took millions of years to form within ancient volcanic rock. Copper Replacement Agates are among the most sought after agates from Michigan's Keweenaw Peninsula, formed when copper rich mineral solutions replaced
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