Colonial Rugose fossil coral Acrocyathus from Kentucky.  Lived 341 mya.
Aquamarine Crystals on Muscovite Mica
Acrocyathusa colonial rugose coral from Kentucky. Lived 340 mya.
Aquamarine Crystals on Muscovite Mica
Acrocyathusa colonial rugose coral from Kentucky. Lived 340 mya.
Colonial Rugose fossil coral Acrocyathus from Kentucky.  Lived 341 mya.
Colonial Rugose Coral, Acrocyathus.  From Kentucky.  Lived 341 mya.
Acrocyathus, a Colonial Rugose Coral fossil from KY. That lived 341 mya.   A. proliferum. 2 pieces.
Colonial Rugose Coral, Acrocyathus.  From Kentucky.  Lived 341 mya.
Kentucky Horn Corals from Nolin Lake.
Fossil coral.  Acrocyathus.  From Kentucky.
Fossil Coral Cabochons.  FL & KY.
Kentucky Horn Corals from Nolin Lake.
Large High Organic Content Calcite and Minor Marcasite Pseudomorph after Fossil Colonial Coral, from the Rensselaer Quarry, Indiana
Fossil shell from roadcut near Nashville TN.
Aquamarine Crystals on Muscovite Mica
Tabulate Coral fossil & geode or cave calcite stalagmite in center.  449mya Kentucky fossil.
Fossil coral.  Acrocyathus.  From Kentucky.
Large High Organic Content Calcite and Minor Marcasite Pseudomorph after Fossil Colonial Coral, from the Rensselaer Quarry, Indiana
Fossil Coral Cabochons.  FL & KY.
Fossil shell from roadcut near Nashville TN.
Acrocyathusa colonial rugose coral from Kentucky. Lived 340 mya.
Large High Organic Content Calcite and Minor Marcasite Pseudomorph after Fossil Colonial Coral, from the Rensselaer Quarry, Indiana
Fossil shell from roadcut near Nashville TN.