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Rucks Pit Clam Filled with Golden-Yellow Calcite Crystals



1.91" (4.86 cm) Clam (Mercenaria permagna) filled with golden-yellow calcite crystals. From Ruck's Pit, Fort Drum, Florida. Nashua Formation, 2 milion years odl. Ruck's pit was a former phoisphate mine that has since been filled in and can no longer be collected.