Ca. 180 million years old.A discoid-shaped gray stone, fossilized dinosaur egg, most likely from a duck-billed species. The top has lost a thin layer of stone. Still attached to a matrix of stone beneath, which acts as a small pedestal.Size: L:125mm / W:140mm ; 3.53kgProvenance: From the collection of a London gentleman, formerly acquired on the US Art market; ex. E. Bourke collection, MD., Yonkers, NY.