The wall around the vessel is made of concentric bone lamellae which in turn have a fibre structure based on mineralized collagen fibrils. Figure 1: Hierarchical structure of a human femur bone; ...

A total of 12 bone lamellae of crocodile were discovered in the Ruins of Haojing, which was part of the capital of the Western Zhou Dynasty (1066-770 BCE), in Xi'an, Shaanxi Province.