A large pyritized ammonite from Buttenheim, Germany, where the original shell material has been naturally replaced by iron pyrite. This XL specimen impresses with its size, showcasing intricate suture patterns from the Jurassic era. While the pyrite luster is more subdued than on smaller pieces, the sheer scale of this ammonite makes it a striking statement piece for any collection.

Highly sought after by collectors, it offers a genuine glimpse into prehistoric marine life and a substantial, eye-catching addition to any display.