| 9fhceis ((SEPTARIAN CONCRETION)), $15 MINIMUM BID, South Dakota, 13 x 10.5 x 3 cm, Cabinet, | |
 | This one looks like a fossil turtle shell but it is a Septarian Concretion from South Dakota. The Septarian Concretion is a fossil mud ball that cracked and the cracks filled with yellow Calcite. ex Philadelphia Academy no number. |
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