Where did they find them? In China. That’s where three new crystallized dinosaur fossils appeared. This provides evidence for the study of dinosaur egg-laying processes and the paleoenvironment.
These crystallized dinosaur egg fossils were found in a nest containing 31 dinosaur egg fossils in Qinglong Mountain. It is in Shiyan City. It was during the process of restoring and managing an outcrop of dinosaur egg fossils.

Good conservation
The three fossil eggs are well preserved, with the eggshells and internal crystalline mineral intact. This was said by Zhao Bi, an academician at the Hubei Institute of Geosciences. He added that the three fossil eggs are believed to be neither cracked nor hatched.
Researchers have discovered that the type of crystalline mineral internal to these crystallized egg fossils is calcite. It has a particle size of 0.2 to 0.4 cm, Xinhua reports.
Compared to normal fossilized dinosaur eggs, crystallized fossils are rare in the world. This is due to the harsh environmental conditions required for their formation. This is the first time that this type of fossilized and crystallized eggs have been found in Hubei province.

Intact
The three fossil eggs remained intact despite burial and subsequent diagenesis. The internal crystalline minerals were formed during burial and diagenesis of the eggs. It was when a large volume of supersaturated calcium carbonate solution infiltrated the pores of the egg shell. This crystallized and filled the eggs, according to Zhao.
These three new fossil dinosaur eggs date back to the mid-Cretaceous period, between 60 and 80 million years ago. They were first discovered on Qinglong Mountain in 1995. To date, researchers have found nearly 3,000 surface-exposed or well-preserved egg fossils at the site.