Extremely rare iridescent ammonite Placenticeras... Lot 76

Extremely rare iridescent ammonite Placenticeras intercalare Campanian, Upper Cretaceous (83-73 Ma) Alberta, Canada D. 11 3/4 in The rarest species among the passionately sought after iridescent Canadian ammonites. The mother of pearl of these magnificent fossils has undergone a unique fossilization process that transformed the shell in a real wonder of nature. The so called ammolite, material officially recognized as a gemstone and known by local indigenous tribes since centuries. A must have for any advanced natural history collection