1 - This piece i believe is Recrystallised sponge.
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5 - This larger piece i believe is recrystallized Coral.
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9 - The pieces seem to be made up of Calcite, a lot of crystals are clearly visible.
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12 I now believe the crystals are part of an Aragonite recrystallisation process that basically involves the mineral soaking into the original limestone, and replacing it. Nodules and minerals from the Mesolithic gravel ... - history of a beck
