(Internal #F-356-D) You are bidding on this natural, fossil fern in slate matrix.
Size: 4-1/4" long x 2-3/4" wide x 3/4" thick, 10 ounces.
FOSSIL FERN in slate, from the Pennsylvanian Period, 350 million years old, St. Clair, Pennsylvania; fern has been replaced with white pyrophyllite and brown iron oxide
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