Mercenaria permagna Pleistocene Nashua Formation, Fort Drum Crystal Mine, Okeechobee County, Florida Dazzling calcite crystals have formed inside these two fossilized clam specimens in their original matrix. They were found in the only known locality in the world yielding this unusual type of specimen. Small specimen measures 6 x 4 ¼ x 3 1/2in overall, Large specimen measures 9 ¼ x 7 x 3in overall
Mercenaria permagna Pleistocene Nashua Formation, Fort Drum Crystal Mine, Okeechobee County, Florida Dazzling calcite crystals have formed inside these two fossilized clam specimens in their original matrix. They were found in the only known locality in the world yielding this unusual type of specimen. Small specimen measures 6 x 4 ¼ x 3 1/2in overall, Large specimen measures 9 ¼ x 7 x 3in overall
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