This ammonite specimen is the perfect piece to have on display! The tile is smoothly polished on one side with its label taped onto the back. 

Ammonite
Species: Perisphinctes sp. 
Age: Jurassic, Malm delta / 160 million years old 
Locality: Treuchtlingen, Germany 

Plate: ~ 3.31 x 0.4 x 4.31 inches
Specimen diameter: ~ 2.5 inches 
Weight: ~ 10 oz / 283.5 g