XL Fossil Pyritized Ammonite with its negative Pleuroceras Jurassic Germany

Pleuroceras from Jurassic age deposits in Buttenheim, Germany.
Although the ammonites are pyritized, in their natural state they are dull. Brushing them brings out their luster.

Pleuroceras

Jurassic

Buttenheim, Germany

Ammonite measures 2.23"w, negative 1.85"w