3" Sauropod Dinosaur Stomach Stone Gastrolith Rock Gizzard Stone COA Cobalt The ammonite shell played multiple

The ammonite shell played multiple vital roles—it protected from predators and helped with flotation and movement in water

paddle-like bony crest on top of its skull

This fossil originates from a pivotal period immediately following the Cretaceous–Paleogene mass extinction

fossils of Poebrotherium have been found in a variety of environments

3" Sauropod Dinosaur Stomach Stone Gastrolith Rock Gizzard Stone COA Cobalt The ammonite shell played multipleLocation: Cloverly Formation, Montana Weight: 3. 9 Ounces Dimensions: 3 Inches Long, 1. 4 Inches Wide, 1. 2 Inches Thick Comes with a Certificate of Authenticity. The item pictured is the one you will receive. This is a real Gastrolith. Gastrolith stones found in the Cloverly Formation are actually Polished stomach stones from large dinosaurs! They are very beautiful and come from Sauropod Dinosaurs like Titanosaurs. They are also called Gastroliths.