Nearly perfect and rare 3 eggs fossil. The 3 eggs shell are complete, few cracks, and it is almost impossible to see such a complete egg in the egg fossil. Dinosaur Oviraptor egg fossil. They date from the Cretaceous, 72.1-83.6 million years ago. They still have shell covering around surface. Elongated dinosaur egg is specific of oviraptor egg. Each one of size is about 21 cm . Because the eggshell also contains pigments, proteins and mineral complexes, it appears black. Oviraptor has a double fallopian tube structure, so they lay two eggs at a time, which is not seen in modern animals.