Dinosaur Gastrolith - 1.633" Gut Stone - 150,000,000 Years Old rockinaboxatlasaurus Above: A pair of Bismuth

Above: A pair of Bismuth crystals in hand

Born from the fiery mouth of an active volcano

The Triceratops’ jaws came together to form a sharp curved beak

65" polished Cleoniceras fossil from Madagascar

Dinosaur Gastrolith - 1.633" Gut Stone - 150,000,000 Years Old rockinaboxatlasaurus Above: A pair of BismuthWithout proper digestive systems, many dinosaurs would ingest stones to aid the breakdown of food in their gut. Known scientifically as gastroliths, the dinosaurs would eventually pass these stones, which would then become fossilized. This specimen is a 1. 633" dinosaur gastrolith from the Morrison Formation in Colorado. It ships in a protective carton, ready for display right out of the box. A specimen card that doubles as a certificate of