| BYSSOLITE, ANDULARIA, PYRITE, Keystone Trappe Rock Quarry, Cornog, Chester County, Pennsylvania, 5 x 3.5 x 2 cm | |
 | Another Pennsylvanian specimen. This is a very hairy specimen full of Byssolite needles covering Andularia. ex Raymond W. Strohmeier collection. |
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