Nearly perfect and rare two eggs fossil. The two 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 17. 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.