Adductor muscle scars inside oyster shells

These are not random patterns. The patterns reflect specific functions, intrinsic physical and chemical compositions, different crystal structures, life history, post-mortem conditions, and taphonomy of the shells. All the specimens were the same species of mollusc, found in the same general location but their appearance tells of different individual experience. Seen at this level of detail, the varying designs, colours, and textures seem like abstract art.