07531 - Top Quality Pyritized 0.98 Inch Unidentified Lower Cretaceous Ammonites Dinosaur Age Mammals They come from the famous

They come from the famous sites of the Judith River Formation in Montana (Campanian stage

Applied Petrology Laboratory (APPLIED PETROLOGY LABORATORY

It is a piece with a size that exceeds that of the average for its species

Anetoceras elegantulum

it is usually found in the form of red hexagonal crystals

07531 - Top Quality Pyritized 0.98 Inch Unidentified Lower Cretaceous Ammonites Dinosaur Age Mammals They come from the famousSpecimen of extreme quality. Unidentified species. His suture lines are wonderfully well detailed. It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.