8.3 x 6.0 x 3.3 cm. An VERY FINE, large, sliced and polished datolite nodule half from Michigan’s Copper Country. This white beauty is porcelaneous and has an unusual pastel-green core with dentritic, red highlights on the edges (caused by copper , I presume). This showy piece is from Isle Royal in Lake Superior, where not too many datolite nodules have been recovered. Ex. Seaman Museum Collection.
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