Figure 5

Scanning electron microscopy image of the nacre super-structure. Scanning electron microscopy of a 60 μm section in orientation A. Top, overview image showing the transition between prismatic and nacreous layers. Center, super-structure in the size range of 20 μm in the nacreous layer. Domains of homogeneous grey level are formed by stacks of adjacent nacre platelets. Bottom, boundary between two domains which form the super-structure.