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  • Two pāua shells on a white background.
    Rights: Image licenced through 123RF limited Published 1 October 2012 Size: 100 KB Referencing Hub media

    The pāua shell is an arrangement of calcium carbonate crystal forms and organic macromolecules such as proteins, lipids and polysaccharides. Mantle tissue controls and directs the laying down of the various layers through a process known as biomineralisation.

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