This listing features a stunning, cut and polished ammonite fossil, Argonauticeras argonautus, from the Aptian stage of the Cretaceous period, discovered in Madagascar. This 10.75-inch ammonite boasts exquisite natural patterns, internal chamber structures, and stunning mineralization, making it a truly spectacular collector’s piece.
Argonauticeras argonautus is a species of ammonite from the early Cretaceous, known for its thick, robust shell with distinctive ribbing and complex suture patterns. These ammonites lived in the warm, shallow seas that covered Madagascar during the Aptian period, approximately 120 million years ago. The internal chambers of this ammonite have been beautifully preserved and mineralized over millions of years, creating an eye-catching display fossil when cut and polished.
The actual fossil shown in the photos is the exact specimen you will receive—no stock images used.
This rare, beautifully polished ammonite fossil is a true statement piece, perfect for collectors, fossil enthusiasts, and interior decorators alike. Don't miss your chance to own a remarkable piece of Earth's ancient history!