Calcite Mercenaria Clam Fossil from Ruck’s Pit
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Calcite Mercenaria clam fossil from Ruck's Pit, Fort Drum, Florida. These are Pleistocene-era hard clams where the original shell material dissolved and was replaced by amber-colored calcite crystals over millions of years. The result is a shell-shaped mass of amber calcite rather than a preserved shell.
Under UV light these display vivid green phosphorescence. The UV reaction comes from the specific calcite chemistry that replaced the original shell. Ruck's Pit is a highly regarded Florida fossil locality. Genuinely spectacular under a UV lamp. Genuine Pleistocene fossil from Florida.
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