Standard split ammonite pair Carboniferous Length 23cm x Width 8cm

Length 23cm x Width 8cm x Depth 4cm

In common with Phacops

Diameter 12cm

grey-silver form

naturally cubic pyrite crystals have formed in a calcite limestone matrix

Standard split ammonite pair Carboniferous Length 23cm x Width 8cmProbably the most decorative fossil we sell, these ammonites have been cut open to reveal the internal spiral of the shell. The once hollow chambers of the shell of this extinct marine Cephalopod (something akin to a shelldwelling squid) have been filled with deposits of calcite, agate and other minerals over millions of years . Cretaceous, Albian, circa 110 million years old. From Mahajunga, Madagascar. Measurements are approximate and the minimum