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7 x 1 x 1 Inches
AND CALCITE
Here is a stunning example of calcite from the legendary Elmwood Mine - The twinned calcite is semi-translucent with vibrant golden undertones and great luster
The skeletons consist of limestone (CaCO3) and the coral becomes agatized when the coral voids are filled with silica-rich water and the limestone is replaced by chalcedony quartz (SiO2) and common opal
Copper (Michigan) Cavansite 7 x 1 x 1COPPER Manganese Mine Copper Harbor Keweenaw County Michigan 2. 75 x 3. 3 x 3. 1 Inches 7 x 8. 5 x 8 Centimeters Cabinet Ex. Harry Critchley Collection
