2.1" Sauropod Dinosaur Stomach Stone Gastrolith Rock Gizzard Stone COA Petoskey commonly referred to as Ammonites

commonly referred to as Ammonites

This process created laminated limestones that hold the highest concentration of fossil fish in the world

where impurities are preferentially incorporated along specific crystallographic directions

Many fossils are naturally revealed when the limestone splits

spanning nearly 140 million years—from around 201 million years ago until their extinction 66 million years ago

2.1" Sauropod Dinosaur Stomach Stone Gastrolith Rock Gizzard Stone COA Petoskey commonly referred to as AmmonitesLocation: Cloverly Formation, Montana Weight: 2. 3 Ounces Dimensions: 2. 1 Inches Long, 1. 9 Inches Wide, 0. 8 Inches Thick Comes with a Certificate of Authenticity. The item pictured is the one you will receive. Gastrolith stones identified in the Cloverly Formation are actually polished stomach stones from large dinosaurs, particularly Sauropods such as Titanosaurs. These beautiful, rare stones, called gastroliths, are found in only a few locations